Weights of men: 90% confidence; n = 14, x=161.5 lb, s =13.7 lb

Answers

Answer 1

Answer:

Answer:

The 90% for the average weights of men is between 137.24 lb and 185.76 lb.

Step-by-step explanation:

We have the standard deviation for the sample, so we use the t-distribution to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 14 - 1 = 14

90% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 14 degrees of freedom(y-axis) and a confidence level of $1 - (1 - 0.9)/(2) = 0.95$ . So we have T = 1.7709

The margin of error is:

M = T*s = 1.7709*13.7 = 24.26

In which s is the standard deviation of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 161.5 - 24.26 = 137.24 lb

The upper end of the interval is the sample mean added to M. So it is 161.5 + 24.26 = 185.76 lb

The 90% for the average weights of men is between 137.24 lb and 185.76 lb.

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Tasia’s bank account balance was -$25.64. She deposited a check into her bank account and her new balance is $152.29. How much was the check that Tasia deposited into her account?

Answers

Answer:

$177.93

Step-by-step explanation:

Answer:

The check is 177.93$

Step-by-step explanation:

I did 25.64+152.29= 177.93

U can check it by doing -25.64+177.93

N - 4 = 3n + 6 Yikesss

Answers

Answer: n=-5

Step-by-step explanation:

Answer:

N=-5

Step-by-step explanation:

N - 4 = 3n + 6

Add 4 to both sides

n-4+4=3n+6+4

Simplify

n=3n+10

subtract 3n from both sides

n-3n=3n+10-3n

Simplify

-2n=10

Divide -2 from both sides

-2n/-2=10/-2

Simplify

n=-5

Write this fraction in the simplest form 15/25

Answers

15/25 Divididing numerator and denominator by 5 we get:

3 / 5

If 15/25 is 0.6 you can then convert it to a 3/5

Help :,)
(both questions)

Answers

The answer to question one is $5.39. I got this answer by adding 16.49 and 1.62 to see how much she had to pay for the jeans and the tax which is 18.11. Then I subtracted 28.69 by 18.11 so I could find out how much money was for both of the jeans which is 10.78. Last I divided by 2 because there are 2 jeans which the answer is 5.39.

The answer to question two is $4.75. I got this answer by adding the coupon and the money for the snack so I could find out how much money was the admission for both of them which is 9.50. Then I divided it by 2 because there were 2 people. And last I got the answer $4.75!!!!

Hope this helps u!!!!

Please help I'm really stressed about this it's simple it's the last question on this assignment I'll mark brainliest plzzz help