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Find the 90th percentile for the sample mean excess time for samples of 75 customers who exceed their basic contract cime allowances.

Find the 90th percentile for the sample mean excess time for samples of 75 customers who exceed their basic contract cime allowances.

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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contract. Find the 90th percentile for the sample mean excess time for samples of 75 customers who exceed their basic contract time allowances. (A) 22.33 B) 19.18 C) 24.82 (D) 20.05
Transcribed Image Text:contract. Find the 90th percentile for the sample mean excess time for samples of 75 customers who exceed their basic contract time allowances. (A) 22.33 B) 19.18 C) 24.82 (D) 20.05
Suppose that a market research analyst for a smartphone company conducts a study of their customers who exceed the time allowance included on their basic contract. The analyst finds that for those people who exceed the time included in their basic contract has a mean of 22 minutes and has a standard deviation of 2.2. Consider a random sample of 75 customers who exceed the time allowance included in their basic cell phone contract. Find the 90th percentile for the sample mean excess time for samples of
Transcribed Image Text:Suppose that a market research analyst for a smartphone company conducts a study of their customers who exceed the time allowance included on their basic contract. The analyst finds that for those people who exceed the time included in their basic contract has a mean of 22 minutes and has a standard deviation of 2.2. Consider a random sample of 75 customers who exceed the time allowance included in their basic cell phone contract. Find the 90th percentile for the sample mean excess time for samples of
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