special industrial battery must have a life of at least 400 hours. a hypothesis test is to be conducted with a 0.02 level of significance. if the batteries from a particular production run have an actual mean use life of 391 hours, the production manager wants a sampling procedure that only 10% of the time would show erroneously that the batch is acceptable. what sample size is recommended for the hypothesis test? use 45 hours as an estimate of the population standard deviation. (round your answer up to the nearest integer.)

Answer:

it's 20 if u look closely

If a jar contains 15 red marbles and 14 blue marbles. If you reach in the jar and pull out 2 marbles at random, the probability that both are red is: 2/812.

Probability

Total marbles:

Total marbles=15+14

Total marbles = 29

Chance that a red will be pulled=2/29

Chance that the second marble will be red =1/28

Hence,

Probability :

Probability = 2/29*1/28

Probability = 0.00246

Therefore  If a jar contains 15 red marbles and 14 blue marbles. If you reach in the jar and pull out 2 marbles at random, the probability that both are red is: 2/812

Learn more about probability here:

brainly.com/question/24756209

#SPJ4

a) The probability that a sample of taxpayers from this income group who have itemized deductions will show a sample mean within $210 of the population mean is 0.9482.

b) When trying to estimate the population mean, a greater sample size offers the benefit of improving the estimation's accuracy.

a. The z-score is calculated as follows:

z = (x - μ) ÷ (σ ÷ √n)

Where the sample size is n, the sample mean is x, the population mean is y, and the population standard deviation is z.

By entering the specified values, we obtain:

n = 30: z = (x - 17,545) ÷ (2,160 ÷ √30) = (x - 17,545) ÷ 216

n = 50: z = (x - 17,545) ÷ (2,160 ÷ √50) = (x - 17,545) ÷ 174

n = 100: z = (x - 17,545) ÷ (2,160 ÷ √100) = (x - 17,545) ÷ 132

n = 400: z = (x - 17,545) ÷ (2,160 ÷ √400) = (x - 17,545) ÷ 53

To find the odds that a sampling distribution could be within $210 of both population mean and the z-score, we must first figure out the likelihood that now the z-score would be within 1.96 standard deviations of the mean. This is because the 95th percentile, or the number under which 95% of the data lies, is represented by the z-score of 1.96, which is the value in this case.

To ascertain the likelihood, we must attempt searching up the z-scores in a z-table and get the pertinent probabilities. A z-table is a table that lists the probability associated with various z-scores.

Using the z-scores we used to develop the concept, we could look up the alternatives in a z-table and find the following probability:

n = 30: 0.4056

n = 50: 0.5082

n = 100: 0.6690

n = 400: 0.9482

For each of the aforementioned sample sizes, the likelihood that a sampling of taxpayers from this income category who itemized deductions will exhibit a sample mean that is within $210 of the population mean is:

n = 30: 0.4056

n = 50: 0.5082

n = 100: 0.6690

n = 400: 0.9482

b. The likelihood that the sample means will closely match the true population mean is thereby increased.

The standard deviation averages commonly fall as the sample size rises. In other words, as the sample mean becomes less likely to depart from the actual population mean, the likelihood that the random variable will be close to the population mean increases.

For instance, in the aforementioned case, the likelihood that they would give it a shot would be within 210 of a population mean would rise from 0.4056 for a random sample of just 30 to 0.9482 for a random sample of 400.

This means that the likelihood that they give it a chance will fall within the allowed range of the sample % likewise increases as the sample size increases.

Learn more about the probability at

https://brainly.com/question/23021425?referrer=searchResults

#SPJ4

Cara has a 25/216 chance of waiting until her third throw before throwing a six.

for the stated question-

Total times the dice is thrown = 3.

Total number of sample space = 6 x 6 x 6 = 216.

The probability of coming six = 1/6

The probability of not coming six = 1 - 1/6 = 5/6.

Probability of getting 6 in third throw = 5/6 x 5/6 x 1/6

Probability of getting 6 in third throw = 25/216

Thus, Cara has a 25/216 chance of waiting until her third throw before throwing a six.

To know more about the sample space, here

https://brainly.com/question/10558496

#SPJ4

Applying the definition of midpoint, the measure of angle GIH in the triangle shown is: 59°.

The corresponding angles of two similar triangles are always congruent to each other.

Given that H is the midpoint of Eg and I is the midpoint of FG, two similar triangles are created, where angles GFE and GIH are corresponding angles.

Given:

m∠GFE = 87 - 7x

m∠GIH = 51 + 2x

m∠GFE = m∠GIH [corresponding angles are congruent]

Substitute

87 - 7x = 51 + 2x

Solve for x

-2x - 7x = 51 - 87

-9x = -36

Divide both sides by -9:

-9x/-9 = -36/-9

x = 4

m∠GIH = 51 + 2x = 51 + 2(4)

m∠GIH = 59°

Learn more about similar triangles on:

https://brainly.com/question/14285697

#SPJ1

Step-by-step explanation:

[tex] {3}^{10 - 6} [/tex]

[tex] = {3}^{4} [/tex]

Answer:

Step-by-step explanation: x is the number of days she is booked.

List an equation

748+86x=734+87x

x=14

14 nights and plugging x into the equation 1952 points

The sample proportion of defective item is 0.184

What is proportion ?

A part, share, or number that is measured in comparison to a whole is referred to as a proportion in general. When two ratios are equal, according to the definition of proportion, they are in proportion. It is a formula or claim that shows that two ratios or fractions are equal.

let x = number of defective items

       = 46

Let n = sample size

        = 250

Therefore , sample proportion of defective items given by

p = x / n

  = 46 / 250

  = 0.184

To learn more about proportion from the given link  

https://brainly.com/question/19994681

#SPJ4

A manager be interested in analyzing risk to determine a range of outcomes.

Project managers and their teams undertake risk analysis, such as calculating the likelihood of various undesirable outcomes affecting a project, to avoid or minimize their impacts. The process can help reduce exposure, time, and budget overruns and keep businesses in compliance.

Analyzing risk can help to uncover threats to the success of the projects or business operations, such as: vulnerabilities in security; potential litigations, penalties and non-compliance issues; and, mistakes in budget or scheduling.

In general, there are 4 accepted ways to respond to risks, those are: avoidance, mitigation, acceptance, and transfer.

Learn more about analyze risk at: https://brainly.com/question/29343207

#SPJ4  

Using the table the quadratic equation is y = x² - 2

from the curve the quadratic equation is y = x² + 1

Quadratic equation is written of the form

y = a(x - h)² + k

from the table the vertex is

v(h, k) = v(0, -2)

substituting the values to the formula

y = a(x - 0)² - 2

y = ax² - 2

Using the point (2, 2) from the table

y = ax² - 2

2 = a * 2² - 2

2 = 4a - 2

4a = 2 + 2

4a = 4

a = 1

The equation of the curve is

y = x² - 2

from the graph the vertex is

v(h, k) = v(0, 1)

substituting the values to the formula

y = a(x - 0)² + 1

y = ax² + 1

Assuming a unit on the graph is a unit we take point (1, 2) where the curve passed

y = ax² + 1

2 = a * 1² + 1

2 = a + 1

a = 2 - 1

a = 1

The equation of the curve is

y = x² + 1

Learn more about quadratic equation here:

https://brainly.com/question/29339843

#SPJ1

To find the margin of error we have to use the formula,

Margin of error =  Z * ơ / √n ,

Where

z = critical factor

ơ = population standard deviation

n = sample size

Now we have to find confidence interval

Confidence interval can be defined as a range of values so defined that there is a specified probability that the value of a parameter lies within it.

The confidence interval of a statistical data can be written as.

x+/-zr/√n

x+/-ME

Where margin of error ME = zr/√n

Given that;

Mean = ц

Standard deviation r = 25

Number of samples n = 41

Confidence interval = 95%

z(at 95% confidence) = 1.96

Xbar = 60.............(1)

Xbar + E = 66.........(2)

from equating both the equations we get

E= 6

and for finding the value of margin of error we know that its the half of the E

Margin of error = E/2

=6/2

=3

Therefore , the Margin of error is 3

To know more about the margin of error

https://brainly.com/question/16835723

#SPJ4

There is no error made in claiming that the mean temperature inside the truck is 32 degrees which is 2 degrees more than the required one.

Given, an ice cream truck aims to keep 30 degrees as the mean temperature inside its delivery truck.

one employee claims that the mean temperature inside its delivery truck is more than 30 degrees. the employee conducts a hypothesis test and rejects the null hypothesis.

The mean temperature inside its delivery truck is 32 degrees.

As, the temperature inside the delivery truck should be 30 degrees and should not be greater than 30 degrees then, there is no error made in claiming that the mean temperature inside the truck is 32 degrees which is 2 degrees more than the required one.

So, there is no error made in claiming that the mean temperature inside the truck is 32 degrees which is 2 degrees more than the required one.

Hence, there is no error made in claiming that the mean temperature inside the truck is 32 degrees which is 2 degrees more than the required one.

Learn more about Mean here https://brainly.com/question/14532771

#SPJ4

The required linear function in slope intercept form is C = 5x + 20

What is equation of line in slope intercept form?

The most general form of equation of line in slope intercept form is given by y = mx + c

Where m is the slope of the line and c is the y intercept of the line.

Slope of a line is the tangent of the angle that the line makes with the positive direction of x axis.

If [tex]\theta[/tex]  is the angle that the line makes with the positive direction of x axis, then slope (m) is given by

m = [tex]tan \theta[/tex]

The distance from the origin to the point where the line cuts the x axis is the x intercept of the line.

The distance from the origin to the point where the line cuts the y axis is the y intercept of the line.

Here,

Let Chandler uses x gigabytes of data and let Chandler's monthly cell phone plan cost be C

Chandler's monthly cell phone plan costs $20 plus $5 per gigabyte of data that he uses

So,

C = 20 + 5x

C = 5x + 20

This is the required linear function in slope intercept form

To learn more about equation of line in slope intercept form, refer to the link-

brainly.com/question/25514153

#SPJ4

The amount of $34.65 is deducted from Ron’s gross wages for social security at 6.2% and Medicare at 1.5% .

Percentage means one part of every cent or hundred. And it is represented by symbol '%'.

Given that Ron earns $450 in gross wages on January 10.

To find deduction amount from Ron’s gross wages for social security at 6.2% ;

Firstly, we find  6.2% of $450 that is $450 x 6.2 / 100 = $27.9 and then we substract to the gross wages.

$450 - $27.9 = $422.1

Now to find 1.5 % of $450 that is 450 x 1.5/ 100 = $6.75 and then we substract to the gross wages.

$450 - $6.75 = $443.25

total deduction amount is $6.75 + $27.9 = $34.65

Therefore, $34.65 is deducted from Ron’s gross wages for social security at 6.2% and Medicare at 1.5%

To learn more about the Percentage;

https://brainly.com/question/24877689

#SPJ1

Answer:

8 - 1/3x = 16

8-8 - 1/3x = 16-8

-1/3x=8

8/-(1/3)= -24

x= -24

Step-by-step explanation:

8- 1/3(-24)=16

If one tries to store a list of single-digit numbers in his or her short-term memory, then he will be able to store 7 numbers on average.

What is short-term memory?

Short-term memory is a concept in psychology that defines the capacity for holding a small amount of information in mind for a short interval. The concept of short-term memory is given by Atkinson-Shiffrin. The information of short-term memory can be transformed into long-term memory through rehearsal.

According to several studies, short-term memory has a space limit of 7 ± 2 chunks of information. The fact is written by a cognitive psychologist of Harvard University named George A. Miller and was published in 1956 in psychological reviews.

Hence, If one tries to store a list of single-digit numbers in his or her short-term memory, then he will be able to store 7 numbers on average.

To learn more about short-term memory click on the link below

https://brainly.com/question/12121626

#SPJ4

The slope of the straight line is 4/5

The slope of a line is a measure of the ratio between the rise and run of that line. The slope of a line is an integral quantity used to calculate the equation of a line

In general, to find the slope of a line, we need to have the values of any two different coordinates on the line.

The slope of a line basically the change in y-coordinate with respect to change in x-coordinate.

This is easily done with a formula given as

m = y₂ - y₁ / x₂ - x₁

Taking data points from the graph attached;

Substituting the values into the slope equation;

m = -2 - 2 / 0 - 5

m = -4 / - 5

m = 4/5

Learn more on slope of a line here;

https://brainly.com/question/16949303

#SPJ1

Answer:

4/3

Step-by-step explanation:

slope = (y_2 - y_1)/(x_2 - x_1)

slope = (-3 - 1)/(-2 - 1)

slope = -4/(-3)

slope = 4/3

It will take 7 hours to paint a room when Sonia and Roman works together.

Given,

Time taken by  Sonia to paint a room = 12 hours

Time taken by Roma to paint the same room = 15 hours

We have to find the time taken by both of them to paint the room if they work together.

Here,

Sonia takes 12 hours

Roman takes 15 hours

LCM of 12 and 15 = 60

12 × 5 = 60

15 × 4 = 60

Total number of works is 60

Now,

Number of works done by Sonia = 5 in an hour

Number of works done by Roman = 4 in an hour

So,

5 + 4 = 9 work can be done by them together in an hour

Then,

Time taken to complete 60 works;

60/9 = 6.66 ≈ 7 hours

That is,

In 7 hours Sonia and Roman paint a room together.

Learn more about work and time here;

https://brainly.com/question/19427560

#SPJ4

The equation representing the number of bottle Barbara need to sell to earn $100 is; 1.49x + 1.25y = 100.

For the given question-

Let the number of iced tea bottle be 'x'.

Let the number of water bottle be 'y'.

Total price = 100

Thus, the equation for the total cost becomes-

1.49x + 1.25y = 100.

Therefore, the equation representing the number of bottle Barbara need to sell to earn $100 is; 1.49x + 1.25y = 100.

To know more about the arithmetic equation, here

https://brainly.com/question/28354530

#SPJ4

a)  The inverse function is obtained by rearranging the variables for temperature and height in the  given equation.

b)   T⁻¹(x) =41-x/1.25

c)  T⁻¹(30) =8.8

The given function is T(h)=41- 1.25h, so the inverse of a function is just obtained by rearranging the variables for height and temperature,  the variable of temperature is replaced by height and vice versa. for the second

T(h)=41- 1.25h,  considering h= x

=>T(x)=41- 1.25x

setting T(x)=x and x= T(x), we get  

41- 1.25T(x) =x

=>1.25T(x) =x -41

=>T(x) =x- 41/ 1.25

now setting T(x)= T⁻¹ (x) we get  : T⁻¹ (x) =41-x/1.25

For  T⁻¹(30) =41-30/1.25= 11/1.25 =8.8

To know more about the inverse refer to the link brainly.com/question/2541698

#SPJ4

The monthly payment amount a woman has to pay for the car is $462.91.

Here we have to find the monthly payment amount.

The cost of car = $23,800

Down payment = $3,500

Rate(r) = 4.5%

time(t) = 4 years

Periodic interest(i) = 0.045/12

Formula to calculate monthly payment:

A = P i( 1 + i[tex])^{n}[/tex] / ( 1 + i[tex])^{n}[/tex] - 1

Loan amount = 23800 - 3500

                      = $ 20300

A = 20300 ( 0.045 /12 ( 1 + 0.045/12[tex])^{48}[/tex])/ (1 + 0.045/12[tex])^{48}[/tex] - 1

  = 20300× 0.004488 / 0.196814

  = 462.91

Therefore the monthly payment is $462.91.

To know more about the monthly payment refer to the link given below:

https://brainly.com/question/17143109

#SPJ4

Answer:

i need points

Step-by-step explanation:

Boxplot tells whether a quantitative variable and a categorical variable are associated.

The distributions of one or more sets of numerical data are shown using boxes and lines in a box plot (also known as a box and whisker plot).

With a centre line designating the median value, box limitations show the range of the centre 50% of the data. From each box, lines extend to represent the range of the remaining data, and dots are positioned beyond the line's margins to represent outliers.

Box plots are used to display the distributions of numerical data values, particularly when comparing them across various groups.

They provide a broad overview of the symmetry, skew, variance, and outliers in a set of data. It is simple to determine where the primary concentration of the data is and to compare different groups.

I've answered the question in general as the question is incorrect

To more about Boxplot here

https://brainly.com/question/12992903

#SPJ4

Answer:

7

Step-by-step explanation:

if he gets $35 in 5 hours then he gets $7 an hour, and 7*7=49.

Answer: 7 hours

Step-by-step explanation:

$35/5 hours=$7 an hour

$49/$7 an hour=7 hours of mowing

The square in RMSE is utilized because it consistently provides a positive number for error, preventing errors from canceling one another out, and grants higher weight to values further from the target function, emphasizing locations for which the estimator is unreliable. To reverse the results of squaring, use the square root. 

What is RMSE?

The difference between values (sample or population values) predicted by a model or estimator and the values observed is typically measured using the root-mean-square deviation (RMSD) or root-mean-square error (RMSE).

The RMSD is the quadratic mean of the square root of the second sample moment of the discrepancies between expected values and observed values.

When computations are made outside of the data sample that was used for estimation, the deviations are referred to as errors (or prediction errors) instead of residuals.

The RMSD is used to combine the sizes of predictions' mistakes for different data points into a single indicator of predictive power. .

RMSD is a metric for accuracy that is used to compare the predicting mistakes of various models.

Hence, The square in RMSE is utilized because it consistently provides a positive number for error, preventing errors from canceling one another out, and grants higher weight to values further from the target function, emphasizing locations for which the estimator is unreliable. To reverse the results of squaring, use the square root. 

Learn more about RMSE click here:

https://brainly.com/question/28331472

#SPJ4

Assuming the population standard deviation is known and the standard deviation of the sample mean x : option (b) is correct : the standard error of the sample mean decreases.

In probability theory, the central limit theorem (CLT) states that the distribution of a sample variable approximates a normal distribution (i.e., a “bell curve”) as the sample size becomes larger, assuming that all samples are identical in size, and regardless of the population's actual distribution shape.

Standard deviation is a calculation of the dispersion or variation in a set of numbers. If the standard deviation is a small number, it means the data points are close to their average value. If the deviation is large, it means the numbers are spread out, further from the mean or average.

There are different ways to write out the steps of the population standard deviation calculation into an equation. A common equation is:

                          σ = ([Σ(x - u)2]/N)1/2

Where:

σ is the population standard deviation

Σ represents the sum or total from 1 to N

x is an individual value

u is the average of the population

N is the total number of the population

A sample mean is an average of a set of data . The sample mean can be used to calculate the central tendency, standard deviation and the variance of a data set. The sample mean can be applied to a variety of uses, including calculating population averages.

Learn more about Standard Deviation:

https://brainly.com/question/23907081

#SPJ4

7m-(7n-18m) is an expression which is equivalent to (2mn)^4/6m^-3 n^-2 Assume m=0 n=0​

What is a expression in maths?

An expression in math is a sentence with a minimum of two numbers or variables and at least one math operation. This math operation can be addition, subtraction, multiplication, or division. The structure of an expression is: Expression is (Number/variable, Math Operator, Number/variable)

for example 4m +5 where 4 is the coefficient of m and 5 is the constant term in other word 4m and 5 are the term of the expression and m is the variable in the expression and addition is the operator.

m=0, n=0.

8m^7n^6/3 10m^7n^6/3 8m^16n^12/3 m^4n^6/3

-7m-(3n-(8m-4n-10m)

-7m-(3n-(8m-4n+10m))

-7m-(3n-(18m-4n))

-7m-(3n-18m+4n)

-7m-(7n-18m)

complete question is

Which expression is equivalent to (2mn)^4/6m^-3 n^-2? Assume m=0 n=0​

learn more about of expression here

https://brainly.com/question/14361792

#SPJ4