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The board of a major credit card company requires that the mean wait time for customers when they call customer service is at most 3.00 minutes. To make sure that the mean wait time is not exceeding the requirement, an assistant manager tracks the wait times of 49 randomly selected calls. The mean wait time was calculated to be 3.20 minutes. Assuming the population standard deviation is 0.90 minutes, is there sufficient evidence to say that the mean wait time for customers is longer than 3.00 minutes with a 90 % level of confidence? Step 2 of 3: Compute the value of the test statistic. Round your answer to two decimal places.

The board of a major credit card company requires that the mean wait time for customers when they call customer service is at most 3.00 minutes. To make sure that the mean wait time is not exceeding the requirement, an assistant manager tracks the wait times of 49 randomly selected calls. The mean wait time was calculated to be 3.20 minutes. Assuming the population standard deviation is 0.90 minutes, is there sufficient evidence to say that the mean wait time for customers is longer than 3.00 minutes with a 90 % level of confidence? Step 2 of 3: Compute the value of the test statistic. Round your answer to two decimal places.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 3GP
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The board of a major credit card company requires that the mean wait time for customers when they call customer service is at most 3.00 minutes. To make sure that the mean wait time is not exceeding the requirement, an assistant manager tracks the wait times of 49 randomly selected calls. The mean wait time was calculated to be 3.20 minutes. Assuming the population standard deviation is 0.90 minutes, is there sufficient evidence to say that the mean wait time for customers is longer than 3.00 minutes with a 90 % level of confidence? Step 2 of 3: Compute the value of the test statistic. Round your answer to two decimal places.
Transcribed Image Text:The board of a major credit card company requires that the mean wait time for customers when they call customer service is at most 3.00 minutes. To make sure that the mean wait time is not exceeding the requirement, an assistant manager tracks the wait times of 49 randomly selected calls. The mean wait time was calculated to be 3.20 minutes. Assuming the population standard deviation is 0.90 minutes, is there sufficient evidence to say that the mean wait time for customers is longer than 3.00 minutes with a 90 % level of confidence? Step 2 of 3: Compute the value of the test statistic. Round your answer to two decimal places.
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