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2. Apple's Mac computer batteries last for 7 hours on a single charge with a standard deviation of 20 minutes. A new supplier offers them a battery that they say will have increased battery life. A random sampling of twelve of the new batteries are tested and found to have a sample mean of 7 hours and 22 minutes and a sample standard deviation of 34 minutes. Does this new battery match the company's claim (to 95% confidence)? Perform a hypothesis test, showing all steps.

2. Apple's Mac computer batteries last for 7 hours on a single charge with a standard deviation of 20 minutes. A new supplier offers them a battery that they say will have increased battery life. A random sampling of twelve of the new batteries are tested and found to have a sample mean of 7 hours and 22 minutes and a sample standard deviation of 34 minutes. Does this new battery match the company's claim (to 95% confidence)? Perform a hypothesis test, showing all steps.

A First Course in Probability (10th Edition)
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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2. Apple's Mac computer batteries last for 7 hours on a single charge with a standard deviation of 20 minutes. A new supplier offers them a battery that they say will have increased battery life. A random sampling of twelve of the new batteries are tested and found to have a sample mean of 7 hours and 22 minutes and a sample standard deviation of 34 minutes. Does this new battery match the company's claim (to 95% confidence)? Perform a hypothesis test, showing all steps.
Transcribed Image Text:2. Apple's Mac computer batteries last for 7 hours on a single charge with a standard deviation of 20 minutes. A new supplier offers them a battery that they say will have increased battery life. A random sampling of twelve of the new batteries are tested and found to have a sample mean of 7 hours and 22 minutes and a sample standard deviation of 34 minutes. Does this new battery match the company's claim (to 95% confidence)? Perform a hypothesis test, showing all steps.
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