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A survey of 25 randomly chosen students at a particular college found that the mean number of years the students were out of school before enrolling at the college was 7.6 years, with a sample standard deviation of 1.4 years. Find the 99% confidence interval for the mean number of years the students were out of school before enrolling at the college.

A survey of 25 randomly chosen students at a particular college found that the mean number of years the students were out of school before enrolling at the college was 7.6 years, with a sample standard deviation of 1.4 years. Find the 99% confidence interval for the mean number of years the students were out of school before enrolling at the college.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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I'm seeking help on the 2nd two bullet points only please. 

**Finding Confidence Intervals** For each of the following, calculate the stated confidence interval, explaining all steps in your process. Then write a statement interpreting the confidence interval in context. - A survey of 500 randomly chosen students at a particular college found that 117 of them actively attend student Q&A hours with their professor. Find the 95% confidence interval for the proportion of students at that college who actively attend student Q&A hours. - A survey of 25 randomly chosen students at a particular college found that the mean number of years the students were out of school before enrolling at the college was 7.6 years, with a sample standard deviation of 1.4 years. Find the 99% confidence interval for the mean number of years the students were out of school before enrolling at the college. - For the scenario above with the mean number of years students were out of school before enrolling in college, find the 99% confidence interval for the mean again, but this time with the assumption that the population standard deviation is 2.3 years.
Transcribed Image Text:**Finding Confidence Intervals** For each of the following, calculate the stated confidence interval, explaining all steps in your process. Then write a statement interpreting the confidence interval in context. - A survey of 500 randomly chosen students at a particular college found that 117 of them actively attend student Q&A hours with their professor. Find the 95% confidence interval for the proportion of students at that college who actively attend student Q&A hours. - A survey of 25 randomly chosen students at a particular college found that the mean number of years the students were out of school before enrolling at the college was 7.6 years, with a sample standard deviation of 1.4 years. Find the 99% confidence interval for the mean number of years the students were out of school before enrolling at the college. - For the scenario above with the mean number of years students were out of school before enrolling in college, find the 99% confidence interval for the mean again, but this time with the assumption that the population standard deviation is 2.3 years.
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