The standard error of the sample mean of a given sample of 43 observations with standard deviation 8.85 is equal to 1.35 ( round to 2 decimal places).
As given in the question,
Population mean of the random variable 'μ' = 141
Standard deviation 'σ' = 8.85
Sample size 'N' = 43 observations
Standard error of the sample mean
= σ / √N
= 8.85 / √43
= 8.85 / 6.56
= 1.349
= 1.35 (round to 2 decimal places )
Therefore, for the given standard deviation and sample size the standard error of the sample mean is equal to 1.35.
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Enter the data below into a calculator to find the correlation coefficient, the regression line equation, and the strength of the linear correlation:
x y
1 6
2 1
3 5
4 2
5 4
6 3
7 7
8 8
9 6
Correlation Coefficient (enter a decimal rounded to the nearest hundredth):
Equation of the regression line (enter as an equation in the form y=mx+b, no spaces, decimals rounded to the nearest hundredth):
Strength of the linear correlation (type one of the following exactly: "Perfect Negative", "Strong Negative", "Moderate Negative", "Weak to No", "Moderate Positive", "Strong Positive", or "Perfect Positive". Watch for spelling!):
Answer:
I guess it's 77 although I'm not in high school
Which inequality is shown in the graph?
A. y−5 < −5/3(x+6)
B. y−5 > −5/3(x+6)
C. y+5 < −5/3(x−6)
D. y+5 > −5/3(x−6)
a large study in the uk was done to determine if there was a link between cell phone usage and brain cancer. the study set out to determine if using a cell phone more, increased the likelihood of getting brain cancer. the study took about 800,000 women and asked them to report their cell phone use in 1999, 2005, and again in 2009. in 2009, they recorded the proportion of women who had developed brain cancer. their conclusion was "in this large prospective study, mobile phone use was not associated with increased incidence of glioma, meningioma or non-cns cancers." is this an observational study or an experiment? justify your answer.
The given case study can be categorized as an observational study .A correctly conducted observational study will never attempt to influence participants' reactions, in contrast to experimental designs, which by definition apply a treatment condition to some individuals.
It is debatable whether cell phones and cancer are related. Studies on cellphones and cancer have been conducted for a long time, with varying degrees of success. There isn't now agreement on the potential cancer risk posed by cellphone use.
The growth of cancer linked to cellphone use appears to be the main cause for concern regarding smartphones and cancer. Despite the fact that cellphone use wasn't prevalent in the 1970s, some research indicates a slight rise in the prevalence of cancer since that decade.
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three points are chosen randomly and independently on a circle. what is the probability that all three pairwise distances between the points are less than the radius of the circle?
There is a 1/12 chance that the three pairwise distances between the locations are smaller than the radius of the circle.
Here,
The first point can be placed anywhere on the circle because it doesn't matter where it is chosen.
A total of 120 degrees and a probability of 1/3 must be provided by the next point, which must be within an arc of 60 degrees on either side. The second point must be 60 degrees or less from the first two.
The third point can be located within an arc with a minimum area of freedom of 60 degrees and a chance of 1/6 if the first two locations are separated by 60 degrees. The third point can be located with a maximum degree of freedom of a 120 degree arc and a 1/3 chance if the first two points are the same.
Up to a maximum of 60 degrees away from the starting point, the likelihood changes linearly.
By averaging the probabilities at either end, we may discover 1/4, the typical likelihood we can position the third point based on a fluctuating second point.
The overall probability is 1 1/3 4 = 1/12.
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The relationship between hours practice and coordinate video game is modeled by the equation Y = 10x graph this relationship on the graph below what is the slope and what does it mean for the situation
answer:
provided in the explanation.
step-by-step explanation:
the graph would contain the points (0,0), (1,10), (2,20), etc. the slope is 10, which represents the number of coordinate video games practiced in x number of hours. the representation for the slope depends on whether coordinate video game or hours practiced is on the x or y axis. hope that helps!
can y’all help me with these three questions
A line's y-intercept is 6, and its slope is 1. What is its equation in slope-intercept form?
Answer:y=x+6
Step-by-step explanation:
y= slopex+y-intercept
A company that manufactures memory chips for digital cameras uses the formula c = 3√n(40 6√n +9 4√n) to determine the cost, c, in dollars, for producing n chips. This formula can be written as c = 120 3√n +27 4√nb, where a and b are constants.
What are the values of a and b?
**answer choices in pic
The values of a and b are 3 and 2.
What is Expression?An expression is combination of variables, numbers and operators.
Given,
A company that manufactures memory chips for digital cameras uses the formula [tex]c=3\sqrt{n} (40\sqrt[6]{n}+9\sqrt[4]{n} )[/tex]
The cost, c, in dollars, for producing n chips.
We need to solve for values a and b.
[tex]c=3\sqrt{n} (40\sqrt[6]{n}+9\sqrt[4]{n} )[/tex]
[tex]c=3\sqrt{n} (40\sqrt[6]{n})+3\sqrt{n} (9\sqrt[4]{n} )[/tex]
[tex]c=120\sqrt{n} \sqrt[6]{n} +27\sqrt{n} \sqrt[4]{n}[/tex]
[tex]c=120n^{\frac{7}{2}} +27n^{\frac{5}{2}}[/tex]
c=[tex]120n^{\frac{3a}{2} } +27n^{\frac{4b}{2} }[/tex]
By solving this we get a=3 and b=2
Hence, the value of a and b is 3 and 2.
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Fill in the Table Values pls
Answer:45 76 97 790 9786 99780 533455 6687878
Step-by-step explanation:
How much would $300 invested at 4% interest compounded monthly be worth after 8 years? round your answer to the nearest cent.
The amount will be $412.91 after 8 years if $300 is invested at 4% interest compounded monthly.
Given:
Principal (P) = $300
rate of interest (r) = 4%
time (t) = 8 years.
compounded monthly.
Amount (A) = ?
we know the formula as:
A(t) = P(1+r/n)^nt
we know t=8
A(8) = 300(1+0.04/12)^12(8)
A(8) = 300(1+0.04/12)^96
A(8) = 300(1.033)^96
A(8) = $412.91
Hence amount after 8 years will be $412.91.
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A manufacturer of refrigerators must ship at least 100 refrigerators to its two warehouses. Each warehouse holds a maximum of 100 refrigerators. Warehouse A holds 25
Krefrigerators already, while warehouse B has 20 on hand. It costs $15 to ship a refrigerator to warehouse A and $10 to ship one to warehouse B. How many refrigerators
should be shipped to each warehouse to minimize cost? What is the minimum cost?
The minimum cost is 12.
A ski rental service charges a $37.30 initial flat rate and then an additional $2.70 per hour. In this situation, what is the value of the y-intercept?
Use point-slope form to write the equation of a line that passes through the point (-13,-19) with the slope 7/6
Answer: [tex]y = \frac{7}{6}x - \frac{23}{6}[/tex]
Work Shown:
[tex]y - y_1 = m(x - x_1)\\\\y - (-19) = \frac{7}{6}(x - (-13))\\\\y + 19 = \frac{7}{6}(x + 13)\\\\y + 19 = \frac{7}{6}x + \frac{7}{6}*13\\\\y + 19 = \frac{7}{6}x + \frac{91}{6}\\\\y = \frac{7}{6}x + \frac{91}{6} - 19\\\\y = \frac{7}{6}x + \frac{91}{6} - 19*\frac{6}{6}\\\\y = \frac{7}{6}x + \frac{91}{6} - \frac{114}{6}\\\\y = \frac{7}{6}x + \frac{91-114}{6}\\\\y = \frac{7}{6}x - \frac{23}{6}\\\\[/tex]
one hundred subjects are to be assigned to two groups for an experiment that requires a completely randomized design
The subjects in Group 1 are those with the 50 lowest four-digit numbers. Group 2 is given the remaining subjects.
An experiment that is conducted at random?What a Random Situation Is Exactly. Any clearly defined procedure that yields an observable result that could not be entirely predicted beforehand is considered a random experiment. In order to avoid any ambiguity or surprise, a random experiment must be clearly defined.
List the subjects in alphabetical order by name.
A four-digit number at random, between 0001 and 9999 (inclusive), should be given to each subject using a table of random numbers.
Leaving out 4 digit that have already been allocated.
The subjects in Group 1 are those with the 50 lowest four-digit numbers. Group 2 is given the remaining subjects.
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Which of the following graphs show the most reliable results (the x-axis shows the original text scores, and the y-axis shows the re-test scores).
The following is the graph that displays the most trustworthy findings:
Choice C
A correlation coefficient is defined.
A measure of correlation between two variables, the correlation coefficient between two variables assumes values between -1 and 1.
The relationship is direct proportional if it is positive, and inverse proportional if it is negative.
Strong correlation exists between two variables if the correlation coefficient's absolute value is higher than 0.6.
This description leads us to conclude that the graph with the highest correlation coefficient is the most accurate, making Option C the proper choice.
Lack of Information
The two solutions to this problem are as follows:
Option B: Create a graph with a r = 0 correlation coefficient.
Option C: Create a graph with a r = 0.87 correlation coefficient.
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when three positive integers $a, b$, and $c$ are multiplied together, their product is $100$. suppose $a < b < c$. in how many ways can the numbers be chosen?
Together the numbers a , b and c can be chosen in 4 ways.
Given:
when three positive integers $a, b$, and $c$ are multiplied together, their product is $100$ and a < b < c .
The positive divisors of 100 are :
1 , 2 , 4 , 5 , 10 , 20 , 25 , 50 , 100.
It is clear that :
10 ≤ c ≤ 50.
so we apply from c value 10.
if c = 10 , then ( a , b , c ) = ( 2 , 5 , 10 )
if c = 20 , then ( a , b , c ) = ( 1 , 5 , 10 )
if c = 25 , then ( a , b , c ) = ( 1 , 4 , 25 )
if c = 50 , then ( a , b , c ) = ( 1 , 2 , 50 )
we can observe ways = 4.
Therefore the number of ways is 4.
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Joseph has a loyalty card good for a 9% discount at his local grocery store. What would his total in dollars and cents be, after the discount and before tax, if the total cost of all the items he wants to buy is $37? Round to the nearest cent.
Answer: $40.33
Step-by-step explanation:
9% of $37 = 3.33
37 + 3.33 = 40.33
A student is taking a multiple-choice test in which each question has four possible answers. She knows the answers to 5 of the questions, can narrow the choices to 2 in 3 cases, and does not know anything about 2 of the questions. What is the probability that she will correctly answer A) 10, b) 9, c) 8 d) 7, e) 6, and f) 5 questions?
Do not need to answer every part if they are worked the EXACT same way.
the probability that she will correctly answer
A) 10 questions = 0
b) 9 questions = 0.00003
c) 8 questions = 0.00039
d) 7 questions =0.00309
e) 6 questions = 0.01622
f) 5 questions = 0.0584
Here the total number of question is 5+3+2= 10, and every question has four possible answers, for this problem, we will be using the binomial distribution, the formula is :
[tex]C_{n,k}[/tex][tex]p^{k}[/tex][tex]q^{n-k}[/tex] ,here C is the combination, p is the probability of success and q is the probability of having the success
for the given situation :
the p = 1/ 4 whereas, q=3/4
here n =10
now for different values of k which is the number of successes, we substitute the know values in the formula, and we get
P(k=10) = 0
P(k=9) = 0.00003
P(k=8) = 0.00039
(P=7)= 0.00309
(P=6)=0.01622
(P=5)= 0.0584
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which sentance describe points that miguel should consider in the goal setting process before he starts to invest
5 added to the difference between a number an 12
Answer:
x-7
Explanation:
Subtract 5 5 from both sides of the equation. Subtract 5 5 from 12 12 . Divide each term in −x=7 by −1 and simplify. Divide each term in −x=7
What is the equation of a line perpendicular to 3z + 4y - 12and passes thru the point (3.2)? Write the equation in slope-intercept form (y=mx+b)
Answer:
Step-by-step explanation:
After you know the equation of this line, you will be able to figure out the equation of the line that runs perpendicular to it. [11] To simplify. y − 6 = 3 2 ∗ ( x − 4) {\displaystyle {y}- {6}= {\frac {3} {2}}* ( {x}-4)} , first multiply all of the numbers in parentheses by the outer value to get.
(5p³z-9z+9) - (p³z + 5z - 4)
Answer:
4p³z - 14z +13
Step-by-step explanation:
(5p³z -9z +9) - (p³z +5z -4)
the - multiplies the bracket
5p³z -9z +9 -p³z -5z +4
collect like terms
5p³z -p³z -9z -5z +9+4
4p³z - 14z +13
In a hypothesis test for population proportion, you calculated the p-value is 0. 01 for the test statistic, which is a correct statement of the p-value?.
According to the hypothesis test, the correct statement of the p-value is mean value is against null hypothesis.
Hypothesis test:
In statistics, hypothesis test means a form of statistical inference that uses data from a sample to draw conclusions about a population parameter or a population probability distribution.
Given,
Here we need to find the correct statement of the p-value for the a hypothesis test for population proportion, you calculated the p-value is 0. 01 for the test statistic.
While we looking into the given question we have identified the value of p value of the test statistic is 0.01.
Then the correct statement of the p-value less than 0.01 will under normal circumstances mean that there is substantial evidence against the null hypothesis.
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what is the equation in point-slope form of a line that passes through the points (7, −8) and (−4, 6) ? responses y+6=−23(x−4) y plus 6 equals negative fraction 2 over 3 end fraction open parenthesis x minus 4 close parenthesis y+6=−1411(x−4) y plus 6 equals negative fracion 14 over 11 end fraction open parenthesis x minus 4 close parenthesis y−6=−23(x+4) y minus 6 equals negative fraction 2 over 3 end fraction open parenthesis x plus 4 close parenthesis y−6=−1411(x+4)
The equation of the line that passes through the points (7, -8) and (-4, 6) in point slope form is y - 6 = -14/11(x + 4)
The coordinates of the first point = (7, -8)
The coordinates of the second point = (-4, 6)
The slope of the line = [tex]\frac{y_2-y_1}{x_2-x_1}[/tex]
Substitute the values in the equation
The slope of the line = (6-(8) / (-4-7)
= 6+8 / -4-7
= 14 / -11
= - 14/11
Point slope form is
[tex]y-y_1=m(x-x_1)[/tex]
Substitute the value in the equation
y - 6 = -14/11(x - (-4))
y - 6 = -14/11(x + 4)
Therefore, the equation of the line is y - 6 = -14/11(x + 4)
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CNNBC recently reported that the mean annual cost of auto insurance is 1037 dollars. Assume the standard deviation is 243 dollars. You take a simple random sample of 69 auto insurance policies. (Do not use tables unless directed to do so.)
Find the probability that a single randomly selected value is more than 987 dollars.
P(XÂ > 987) =Â
Find the probability that a sample of size n=69 is randomly selected with a mean that is more than 987 dollars.
P(¯x > 987) =Â
Enter your answers as numbers accurate to 4 decimal places.
The probability that a single randomly selected value is more than 987 dollars is 0.5664
We know that probability is defined as the ratio of number of favorable outcomes to the total number of outcomes.
We know very well that z-value is calculate by the formula
z = (X-μ) / σ/√n
where z is the z-value,
X is randomly selected value,
μ is standard mean
σ is standard deviation and
n is the sample size.
For, X=987
=>z = (987-1037) / (243/√69)
=>z= -50 / (243 / 8.33)
=>z = -50 / (29.171)
=>z= -1.714
Now, we need to find the probability of A>987,so,we need to find what is the probability of A<=987.
P(X>987)= 1-P(X≤987)
=>P(X>987)=1-P(z<(-1.714))
Using the z-table ,we get that P(z<(-1.714))=0.43353
Therefore, P(X>987)=1-0.43353=0.5664
Hence, required probability is 0.5664
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(Complete question) is:
CNNBC recently reported that the mean annual cost of auto insurance is 1037 dollars. Assume the standard deviation is 243 dollars. You take a simple random sample of 69 auto insurance policies. (Do not use tables unless directed to do so.)
Find the probability that a single randomly selected value is more than 987 dollars. P(Â > 987).Enter your answers as numbers accurate to 4 decimal places.
Joey ha 8 pair of ock in hi drawer. Five of the pair are white. What percent of joey ock are colored?
Using percentages, we know that Joey has 37.5% of colored pairs of socks.
What is the percentage?%, which is a relative figure used to denote hundredths of any quantity.
Since one percent (symbolized as 1%) is equal to one-hundredth of something, 100 percent stands for everything, and 200 percent refers to twice the amount specified.
Percentage, which means "per 100," designates a portion of a total sum. 45 out of 100 is represented by 45%, for instance.
Finding the percentage of a whole in terms of 100 is what percentage calculation is.
Both manual calculation and the use of internet calculators are options.
So, the percentage of colored pair of socks are:
We know that Joey has a total of 8 pairs of socks.
We also know that 5 pairs of socks are white.
Hence, the colored pair of socks will be:
8 - 5 = 3
Calculate its percentage as follows:
3/8 * 100
0.375 * 100
37.5%
Therefore, using percentages, we know that Joey has 37.5% of colored pairs of socks.
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42,786,950 writen in scientific notation
Answer: 4.278695 × 10^7
Step-by-step explanation:
Answer: 4.2786950x10^7 or 4.2x10^7
Step-by-step explanation:
To convert a number to scientific notation, move the decimal.
42,786,950
At the and of this number, there is an understood decimal. To find the scientific notation version of it, move the decimal over to the left until you have only one digit to the left of the decimal, as such...
4.2786950
To then find what the exponent you're multiplying by, you count how many places you moved the decimal.
So in the end, you get 4.2786950x10^7
a. a rectangular solar panel is made up of small squares. a particular solar panel is 5 squares by 27 squares. in what other rectangular arrays could the squares have been arranged? b. if there were 23 squares, how many rectangular arrays can there be?
(a) The rectangular arrays could the squares have been arranged as
1 by 135, 3 by 45, 5 by 27, 9 by 15, 15 by 9.
(b) The rectangular arrays is of 1 by 23.
What is solar panel?
An assembly of photovoltaic solar cells installed on a frame (often rectangular) is known as a solar cell panel, solar electric panel, photo-voltaic (PV) module, PV panel, or solar panel. A well-organized collection of PV panels is known as a photovoltaic system or solar array. Sunlight is used by solar panels to collect radiant energy, which is then transformed into direct current (DC) power.
(a) Let a particular solar panel is 5 squares by 27 squares.
5 by 27 = 135 which can be arranged as,
1 by 135
3 by 45
5 by 27
9 by 15
15 by 9
(b) There were 23 squares.
The factors of 23 are 1, 23 only so there can be only 1 rectangular array of 1 by 23.
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The function f(x)=lnx has a Taylor series at a=6. Find the first 4 nonzero terms in the series, that is write down the Taylor polynomial with 4 nonzero terms.
The Taylor series expansion of f of x is given by 11e to the fourth power + 22e to the fourth power times x minus two plus 22e to the fourth power multiplied by x minus two all squared, where f of x is equal to 11e to the power of two x in rising powers of x minus two.
What is Taylor series?An infinite sum of words that are expressed in terms of a function's derivatives at a single point is known as the Taylor series or Taylor expansion of a function in mathematics.
Near this point, the function and the sum of its Taylor series are equivalent for the majority of common functions.
For Brook Taylor, who introduced the Taylor series in 1715, they are named after him. When 0 is the point at which the derivatives are taken into account, a Taylor series is also known as a Maclaurin series in honor of Colin Maclaurin, who made great use of this unique situation of Taylor series in the middle of the 18th century.
The nth Taylor polynomial of a Taylor series is a polynomial of degree n that is created by the partial sum of the first n + 1 terms of a Taylor series.
Hence, The Taylor series expansion of f of x is given by 11e to the fourth power + 22e to the fourth power times x minus two plus 22e to the fourth power multiplied by x minus two all squared, where f of x is equal to 11e to the power of two x in rising powers of x minus two.
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(x^4+6x^3-x^2-5x+1)/(x-2)
PLEASE HELP SYNTHETIC DIVISION
Answer:
x^3+8x^2+15x+25+51
x-2