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The 90% confidence interval estimate of is 187 17.1 187 50 18712.82 187 10 Question 19 Suppose Apple claims that the average wait of a customer is 175 seconds. In light of the sample evidence and at the 10% level of significance, We can reject Apple's claim We may or may not reject Apple's claim We can not reject Apple's claim

The 90% confidence interval estimate of is 187 17.1 187 50 18712.82 187 10 Question 19 Suppose Apple claims that the average wait of a customer is 175 seconds. In light of the sample evidence and at the 10% level of significance, We can reject Apple's claim We may or may not reject Apple's claim We can not reject Apple's claim

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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The following 5 questions are based on this information. A random sample of 25 Apple (the company) customers who call Apple Care Support line had an average (X) wait time of 187 seconds with a sample standard deviation (s) of 50 seconds. The goal is to construct a 90% confidence interval for the average (μ) wait time of all Apple customers who call for support. Assume that the random variable, wait time of Apple customers (denoted by X), is normally distributed.
Transcribed Image Text:The following 5 questions are based on this information. A random sample of 25 Apple (the company) customers who call Apple Care Support line had an average (X) wait time of 187 seconds with a sample standard deviation (s) of 50 seconds. The goal is to construct a 90% confidence interval for the average (μ) wait time of all Apple customers who call for support. Assume that the random variable, wait time of Apple customers (denoted by X), is normally distributed.
Question 18 The 90% confidence interval estimate of is 187 17.1 187 +50 187 12.82 187 10 Question 19 Suppose Apple claims that the average wait of a customer is 175 seconds. In light of the sample evidence and at the 10% level of significance, O We can reject Apple's claim We may or may not reject Apple's claim We can not reject Apple's claim
Transcribed Image Text:Question 18 The 90% confidence interval estimate of is 187 17.1 187 +50 187 12.82 187 10 Question 19 Suppose Apple claims that the average wait of a customer is 175 seconds. In light of the sample evidence and at the 10% level of significance, O We can reject Apple's claim We may or may not reject Apple's claim We can not reject Apple's claim
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