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The average length of time for students to register for fall classes at a certain college has been 50 minutes with a standard deviation of 10 minutes. A new registration procedure using modern computing machines is being tried. If a random sample of 12 students had an average registration time of 42 minutes with a standard deviation of 11.9 minutes under the new system, test the hypothesis that the population mean is now less than 50, using a significance level of 0.05. Assume the population of times to be normal. Provide the following. a. Null and Alternative Hypothesis b. Critical value c. The computed z/t value. d. Decision e. Draw the graph

The average length of time for students to register for fall classes at a certain college has been 50 minutes with a standard deviation of 10 minutes. A new registration procedure using modern computing machines is being tried. If a random sample of 12 students had an average registration time of 42 minutes with a standard deviation of 11.9 minutes under the new system, test the hypothesis that the population mean is now less than 50, using a significance level of 0.05. Assume the population of times to be normal. Provide the following. a. Null and Alternative Hypothesis b. Critical value c. The computed z/t value. d. Decision e. Draw the graph

A First Course in Probability (10th Edition)
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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2. The average length of time for students to register for fall classes at a certain college has been 50 minutes with a standard deviation of 10 minutes. A new registration procedure using modern computing machines is being tried. If a random sample of 12 students had an average registration time of 42 minutes with a standard deviation of 11.9 minutes under the new system, test the hypothesis that the population mean is now less than 50, using a significance level of 0.05. Assume the population of times to be normal. Provide the following. a. Null and Alternative Hypothesis b. Critical value c. The computed z/t value. d. Decision e. Draw the graph
Transcribed Image Text:2. The average length of time for students to register for fall classes at a certain college has been 50 minutes with a standard deviation of 10 minutes. A new registration procedure using modern computing machines is being tried. If a random sample of 12 students had an average registration time of 42 minutes with a standard deviation of 11.9 minutes under the new system, test the hypothesis that the population mean is now less than 50, using a significance level of 0.05. Assume the population of times to be normal. Provide the following. a. Null and Alternative Hypothesis b. Critical value c. The computed z/t value. d. Decision e. Draw the graph
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