The mean and the standard deviation of the sample of 100 bank customer waiting times are x¯ = 5.36 and s = 2.455. (1) Calculate a t-based 95 percent confidence interval for µ, the mean of all possible bank customer waiting times using the new system. (2) Are we 95 percent confident that µ is less than 6 minutes?.

The mean and the standard deviation of the sample of 100 bank customer waiting times are x¯ = 5.36 and s = 2.455. (1) Calculate a t-based 95 percent confidence interval for µ, the mean of all possible bank customer waiting times using the new system. (2) Are we 95 percent confident that µ is less than 6 minutes?.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.1: Measures Of Center

Problem 4GP

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Question

The mean and the standard deviation of the sample of 100 bank customer waiting times are x¯ = 5.36 and s = 2.455.

(1) Calculate a t-based 95 percent confidence interval for µ, the mean of all possible bank customer waiting times using the new system.

(2) Are we 95 percent confident that µ is less than 6 minutes?.

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