Mathematics College

Consider a right-tailed test (upper tail) and a sample size of 40 at the 95% confidence level. The value of t is ________.
a. +2.023
b. -2.023
c. -1.685
d. +1.685

Answers

Answer 1

Answer:

The correct option is d.

Step-by-step explanation:

The directional hypothesis is:

[tex]H_{a}:\mu>\mu_{0}[/tex]

The sample size is, n = 40.

The significance level is:

[tex]\alpha =1-0.95=0.05[/tex]

Use the t-table to compute the right-tailed t-critical value as follows:

[tex]t_{\alpha,\ (n-1)}=t_{0.05, (40-1)}[/tex]

             [tex]=t_{0.05, 39}\\\\\approx t_{0.05, 40}\\\\=1.684\\\\\approx 1.685[/tex]

The value is positive since the directional hypothesis suggests that the test is right tailed.

The correct option is d.

Consider A Right-tailed Test (upper Tail) And A Sample Size Of 40 At The 95% Confidence Level. The Value

Related Questions

A 36-m-wide field is how many yards wide?
The field is yards wide.
(Type a whole number or a decimal. Round to three decimal places as needed.)

Answers

Answer 39.370

Step-by-step explanation:

2 x 6 x 5 = 5 X 6 X 2
Commutative Property
Identity Property
Associative Property
Distributive Property

Answers

Answer:

commutative property

Step-by-step explanation:

commutative property states that ab=ba.

In​ 2010, the population of some countries was 1,200,000 people. From 2010 to​ 2050, the population is expected to increase by ​50%. Find the expected population of the country in 2050.

The population of the country in 2050 is expected to be ______people. ​(Simplify your​ answer.)

Answers

Answer:

7,200,000

Step-by-step explanation:

A certain shows two s. A is long but is long on the . What is the unit rate for per on this ​? If B is ​long, how long is B on the ​? The unit rate is nothing ​(​) per .

Answers

Answer:

44

Step-by-step explanation:

Pauline Romer has taken a $100000 mortgage loan on her house at an interest rate of 3 percent per year. If the mortgage calls for 20 equal annual payments, what is the amount of each payment?

Answers

Answer:

5000

Step-by-step explanation:

Using the mortgage interest principle, the amount of equal payment to be made ls $8000

Mortgage payment = $100000

Interest rate = 3%

The total amount to repayed can be calculated thus :

Mortgage payment × interest rate × time

Number of annual payments = 20

Total repayment = 100000(1 + (0.03 × 20))

Total repayment = 100000 + 60000 = $160,000

Amount of each payment = $160000 / 20 = $8000

Therefore, the amount to be repayed annually is $8000

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The probability of two events A and B happening simultaneously is 0.17. The probability of only event A happening is 0.34. Find the probability of event B happening, if event A has already happened

Answers

Answer:

because is the probability is 0.17 and 0.34 is fair

You can use the multiplication rule of probability.

The probability of event B happening if event A has already happened is 0.5

What does general multiplication rule of probability says for 2 events A and B?

[tex]P( A \: \rm and \: B) = P(A)P(B|A) = P(B)P(A|B)[/tex]

Since we've to find the probability of B given that A has already happened, we need [tex]P(B|A)[/tex]

Since the probability of both event A and event B happening simultaneously is 0.17, thus:
[tex]P(A \: \rm and \: B) = 0.17\\ [/tex]

Since the probability of only event A happening is 0.34, thus:

[tex]P(A) = 0.34[/tex]

Thus, from the multiplication rule, we have:
[tex]P(A \: \rm and \: B) = P(A)P(B|A)\\ 0.17 = 0.34 \times P(B|A)\\\\ \dfrac{0.17}{0.34} = P(B|A)\\\\ P(B|A) = \dfrac{1}{2} = 0.5[/tex]

Thus, we have the probability of event B happening when A has already happened as 0.5

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canning operation is designed to fill cans with 14.5 oz of ingredients, on average, with a standard deviation of 0.1 oz. Nine cans are selected at random from the process, and the weights of the nine cans averaged 14.52 oz with a standard deviation of 0.075 oz. The standard error of the sample mean is:

Answers

Answer:

SE = 0.025

Step-by-step explanation:

We are given;

Sample mean; x¯ = 14.52

Sample standard deviation; s = 0.075

Sample size; n = 9

Now,formula for standard error of sample mean is;

SE = s/√n

SE = 0.075/√9

SE = 0.075/3

SE = 0.025

Use the commutative property of multiplication to rewrite 12.2.3.
Which expression is equivalent?

Answers

Answer:

2.3.12.

Step-by-step explanation:

Please help I have been stuck for 2 HOURS!

TY

Answers


the answer is
slope: - 1/6
y interpret (0,-6)
Ggfccffffffffffffffffff

3) Theodore took a test with 200 questions on it and answered 165 of them correctly. What percentage of questions did Theodore get right?​

Answers

Theodore 84% of the questions right.

If you wanted to know the percentage he got wrong then it is 16% wrong and 84% right.......

Help please ten points

Answers

Answer:

13841287201

Step-by-step explanation:

[tex](7^{6}) = 117649[/tex]  [tex](117649)^{2} = 13841287201[/tex]  

I hope this helps!

Answer:

13481287201

Whatever is in parentheses you do first. So 7 to the power of 6 is multiplying 7 by itself 6 times using the sum of the previous answer. You would get 117649. In other words, use a calculator. Now, you have (117649)^2. So just use a calculator and get 13481287201

(PLEASE HELP ASAP!!!)Micheal has five different stocks that he watches on a daily basis. The table shows the change in each stock price in dollars at the end of a trading day.

What is the correct order of the rational numbers in the table from least to greatest?

A) -1.5, 2.9, -1/2, 3 3/4, 4.6

B) -1/2, -1.5, 2.9, 3 3/4, 4.6

C) -1.5, -1/2, 2.9, 3 3/4, 4.6

D) 4.6, 3 3/4, 2.9, -1/2, -1.5

Answers

Answer:

C

Step-by-step explanation:

The vertices of a triangle are as follows: (6, -3), (1, 5), and (8, -4) If you dilate the triangle by a scale factor of 3, what are the vertices of the new triangle?

Answers

(18, -9) (3, 15) (24, -12)

Find the slope of the line that passes through (64, -7) and (54, 67).

Simplify your answer and write it as a proper fraction, improper fraction, or integer.

Answers

The slope is -37/5

Hope this helps!

Answer:

-37/5 because you subtrace both y values on the numerator to get 74 and on the bottom you do the same for x and get -10 and then you simplify to get -37/5

help, brainliest to whoever answers

Answers

Answer: 45
Plug in 150 for s in the equation and solve
The answer is $45

150(.50)-30= 45

Hope this helps :)

Operations & Algebraic Thinking - 1/10 e) How many times smaller is a group of 11 marbles than a group of 88 marbles?​

Answers

Answer:

8

Step-by-step explanation:

88 ÷ 11 = 8, therefore the answer is 8

A store orders 22 boxes of light bulbs. Each box has 148 bulbs.
Which is the best estimate of the total number of bulbs the store orders?

Answers

Answer:

3,256bulbs

Step-by-step explanation:

From the question, we can see that;

Total number of boxes ordered = 22boxes

If each box contains 148 bulbs, then;

1 box = 148bulbs

To get the total bulbs we have we will say;

22boxes = x bulbs

solve this two expressions for x:

1box = 148bulbs

22boxes = x bulbs

Cross multiply

1×x = 22×148

x = 3256bulbs

Hence the best estimate of the total number of bulbs the store orders is 3,256bulbs

Answer:

Step-by-step explanation:

Answer:

3,256bulbs

Step-by-step explanation:

From the question, we can see that;

Total number of boxes ordered = 22boxes

If each box contains 148 bulbs, then;

1 box = 148bulbs

To get the total bulbs we have we will say;

22boxes = x bulbs

solve this two expressions for x:

1box = 148bulbs

22boxes = x bulbs

Cross multiply

1×x = 22×148

x = 3256bulbs

Hence the best estimate of the total number of bulbs the store orders is 3,256bulbs

the ratio of boys to girls in a homeroom at berkmar middle school is 3:4.If there are 12 ,how many girls are there in homeroom

Answers

Answer:

16

Step-by-step explanation:

a PetSmart your dad is trying to decide which type of dog food to purchase. if he is solely trying to find the product with the cheapest cost per ounce, which item should be purchase? (these prices are accurate!)​

Answers

The fourth one IAMS

determine the area of a circle whose circumference is 70​

Answers

389.93 I think is the area

Steve opens a bank account. The amount, in dollars, in the account x weeks after the account is opened can be modeled by function f. If Steve has $5,000 in the account 20 weeks after the account is opened, which TWO of the following must be true?

Answers

The missing options are:

[tex]A.\ f(20) =5,000[/tex]

[tex]B.\ f(5000) = 20[/tex]

C. In the xy plane, point (20, 5,000) is on the graph y = f(x).

D. In the xy plane, point (5,000,20) is on the graph y = f(x)

Answer:

[tex]A.\ f(20) =5,000[/tex]

C. In the xy plane, point (20, 5,000) is on the graph y = f(x).

Step-by-step explanation:

Given

Represent amount with y and weeks with x

So, we have:

x = 20 when y = 5000

Required

Select 2 correct options

A point on a graph can be illustrated using  [tex](x,y)[/tex]

So, when x = 20 and y = 5000 ----- given

[tex](x,y)[/tex] implies that:

[tex](x,y) = (20,5000)[/tex]

We got [tex](20,5000)[/tex] by substituting 20 for x and 5000 for y

From the list of given options, the above represented of (x,y) is illustrated in option C

Represent (x,y) as a function, we have:

[tex]y = f(x)[/tex]

Substitute values for x and y

[tex]5000 = f(20)[/tex]

Reorder

[tex]f(20) = 5000[/tex]

The above is illustrated in option A

Hence, A and C answers the question

A quality control group found 7 defects for every 1250 units produced. If 8750 products were produced how many defects were there?

Answers

49 defects hope this helps :)

Which numbers are integers?Check all that apply.
O 15
-9
0
0 -3,128
4.76
Ur welcome

Answers

Answer:

15, -9, and 0

Step-by-step explanation:

Integers are whole numbers like; -3, -2, -1, 0, 1, 2, 3, and so on. Fractions and decimals are not integers because they are parts, not wholes.

Answer:

The one at the top is the answer. She is smart lol

Step-by-step explanation:

Good job whoever posted that pic!!!!!

<33333

Good job nakylanicole



Kevin is 150.5 centimeters tall. His older brother, Darrell is 1.2 times as tall as him.
How tall is Darrell? *

A) 125.42 centimeters
B)170.57 centimeters
C) 180.6 centimeters
D) 251.5 centimeters

Answers

You just have to multiply 150.5 times 1.2 and you get 180.6

Harold cut 18 1/2 inches off a rope that was 60 inches long.

Answers

Answer:

41.5?

Step-by-step explanation:

is that it to the question or is there more?!?!

Answer:

0.42

Step-by-step explanation:

60-18= 42

42/100=0.42

(Hope this helped! :D)

15 POINTS! GIVE REAL ANSWERS PLEASE. HELP WOULD BE MUCH APPRECIATED THANKS!
Which algebraic expression does this model represent?

*IMAGE LINKED*

4x+16

4(x+3)

x+34

-4(x+3)

Answers

Answer:

4(x + 3) / 4x + 12

Step-by-step explanation:

the image linked is showing 4 green whihc means 4x and 12 squares so I multiply 4 x 3 whihc is 12

A bag contains: . 5 red marbles • 6 blue marbles • 3 green marbles • 4 black marbles • 2 yellow marbles A marble will be drawn from the bag and replaced 100 times. What is a reasonable prediction for the number of times a green or black marble will be drawn?

Answers

Answer:

For 100 draws, I would expect green or black to be drawn 35 times.

Step-by-step explanation:

5 + 6 + 3 + 4 + 2 = 20 marbles

I would expect green or black to be drawn 7/20 of the time.

addition process of removing the one marble and adding 100 to the amount of green and black marble

Solve four sixths plus one third

Answers

Answer:

1

Step-by-step explanation:

1 is the solution of  four sixths plus one third

What is Number system?

A number system is defined as a system of writing to express numbers.

We need to solve for four sixths plus one third

four sixths is nothing four by six

4/6

One third is 1/3

Four sixths plus one third

4/6+1/3

LCM of 6 and 3 is 6

4+2/6

6/6=1

Hence, 1 is the solution of  four sixths plus one third

To learn more on Number system click:

https://brainly.com/question/22046046

#SPJ2

Whoever answers gets brainlist!

Answers

Answer:

Its A and C

Step-by-step explanation:

√73= 8.54

Its on the left side of 9 and on the right side of 7.

2 1/7 divided by 1 2/5

Answers

The answer to the problem would be 5/7. Hope this helps.
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