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Name: A random sample of 150 physics students were asked how many lab classe
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Description: A random sample of 150 physics students were asked how many lab classes he or she was enrolled in January 1995. The results showed a mean of 1.74 lab classes with a standard deviation of 1.49. Twenty years later, a similar survey was conducted to det

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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A random sample of 150 physics students were asked how many lab classes he or she was enrolled in January 1995. The results showed a mean of 1.74 lab classes with a standard deviation of 1.49. Twenty years later, a similar survey was conducted to determine if the distribution changed. The 2015 sample mean was 1.87 with a standard deviation of 1.57. Do the data provide statistical evidence that the mean number of lab classes taken in the first survey is different from the survey taken 20 years later? Perform the appropriate test using α = 0.10.

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