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Question 7: can we use this to determine a 95% confidence interval for the average study time of All students for final exams? 

Question 7: can we use this to determine a 95% confidence interval for the average study time of All students for final exams? 

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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Question 7: can we use this to determine a 95% confidence interval for the average study time of All students for final exams? 
A college wants to know how much students prep for final exams. The college randomly samples 31 students and ask them their student habits for finals. The students had an average study time of 12 hours with a standard deviation of 10 hours. Can we use this to determine a 95% confidence interval for the average study time of all students for final exams? Yes, (8.48, 15.52) Yes, (8.33, 15.67) Castro didn't cover this in lecture. No the sample size is too small and the distribution is not normal.
Transcribed Image Text:A college wants to know how much students prep for final exams. The college randomly samples 31 students and ask them their student habits for finals. The students had an average study time of 12 hours with a standard deviation of 10 hours. Can we use this to determine a 95% confidence interval for the average study time of all students for final exams? Yes, (8.48, 15.52) Yes, (8.33, 15.67) Castro didn't cover this in lecture. No the sample size is too small and the distribution is not normal.
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