A manager of an XYZ bank branch office located in a small town makes efforts to improve the customer service. The manager claimed that his efforts caused customer waiting times decrease to less than 5 minutes. To prove it, he took a random sample of 15 customers and observed their waiting times, the results are as follows: 4.21 5.55 3.02 5.13 4.77 2.34 3.54 3.20 4.50 5.10 2.38 5.12 6.46 6.19 3.79 a. Set up the null and alternative hypothesis to be tested b. At the 0.05 significance level, determine the critical value c. Determine the statistical test d. Write down the conclusion e. Determine the 95% confidence interval for µ

A manager of an XYZ bank branch office located in a small town makes efforts to improve the customer service. The manager claimed that his efforts caused customer waiting times decrease to less than 5 minutes. To prove it, he took a random sample of 15 customers and observed their waiting times, the results are as follows: 4.21 5.55 3.02 5.13 4.77 2.34 3.54 3.20 4.50 5.10 2.38 5.12 6.46 6.19 3.79 a. Set up the null and alternative hypothesis to be tested b. At the 0.05 significance level, determine the critical value c. Determine the statistical test d. Write down the conclusion e. Determine the 95% confidence interval for µ

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section: Chapter Questions

Problem 8CR

See similar textbooks