The average length of time for students to have their subjects controlled is 30 minutes. A new controlling procedure using modern computing machines is being tried. If a random sample of 12 students has an average controlling time of 22 minutes with a standard deviation of 11.9 minutes under the new system, test the hypothesis that the average length of time to control student’s subjects is less than 30 minutes. Use a level of significance of 0.05 and assume the population of controlling times to be normally distributed.
The average length of time for students to have their subjects controlled is 30 minutes. A new controlling procedure using modern computing machines is being tried. If a random sample of 12 students has an average controlling time of 22 minutes with a standard deviation of 11.9 minutes under the new system, test the hypothesis that the average length of time to control student’s subjects is less than 30 minutes. Use a level of significance of 0.05 and assume the population of controlling times to be normally distributed.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 1GP
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The average length of time for students to have their subjects controlled is 30 minutes. A new controlling procedure using modern computing machines is being tried. If a random sample of 12 students has an average controlling time of 22 minutes with a standard deviation of 11.9 minutes under the new system, test the hypothesis that the average length of time to control student’s subjects is less than 30 minutes. Use a level of significance of 0.05 and assume the population of controlling times to be
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