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.
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.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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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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