Question

Can you help me

Answer 1

You have data from a sample of 80 workers at a local factory who are full time employees. The mean systolic blood pressure of this sample 130. You know that the population standard deviation (σ) of all workers' systolic blood pressure at the local factory is 15.



Which of the below represents a 95% confidence interval for the unknown population mean systolic blood pressure of local factory workers who are full time employees.

(hint: since the population standard deviation (σ) is known, you can use the z-distribution for your confidence interval construction.)

Select one:
A. [126.71 – 133.29]
B. [121.25 – 131.19]
C. [125.68 – 134.32]
D. [127.24 – 132.76]
E. [129.83 – 131.15]

Answer 2

@jim_thompson5910 @jabez177

Answer 3

@jacobciezki

Answer 4

Idk I think c not sure

Answer 5

Are you good with stats

Answer 6

Not really sry

Answer 7

Can you pm me plz

Answer 8

The 95% confidence interval can be calculated by using the following:
\[\large C.I.=(\bar{x}-1.96\frac{\sigma}{\sqrt{n}},\ \bar{x}+1.96\frac{\sigma}{\sqrt{n}})\]

Answer 9

@toxicsugar22 wut grade u in? this looks higher than what my grade lvl learns

Answer 10

Is it A. [126.71 – 133.29]

Answer 11

wut grade u in?

Answer 12

Yes, choice A is correct.

Answer 13

Use data from the previous question: "You have data from a sample of 80 workers at a local factory who are full time employees. The mean systolic blood pressure of this sample 130. You know that the population standard deviation (σ) of all workers' systolic blood pressure at the local factory is 15."

Which of the below represents the best interpretation of the 95% confidence interval you calculated on the previous question for the unknown population mean systolic blood pressure of local factory workers who are full time employees?

*note: the actual values for the confidence interval limits are left blank intentionally

Select one:
A. About 95% of local factory workers who are full time employees have a systolic blood pressure between ___ and ___.
B. We are 95% confident that the unknown population mean systolic blood pressure of local factory workers who are full time employees falls between ___ and ___.
C. It is guaranteed that the unknown population mean systolic blood pressure of local factory workers who are full time employees falls between ___ and ___.
D. We are 95% confident that the sample mean systolic blood pressure of local factory workers who are full time employees falls between ___ and ___.

Answer 14

@kropot72

Answer 15

You shouldn't post more than one question per post...

Answer 16

This question continues with the other post

Answer 17

It is still a new question and you can post the previous data into the new question post.