Answered: 2 PM 1. A battery manufacturer claims… | bartleby

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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T
t 4:22 PM
1. A battery manufacturer claims that its new model of AA battery lasts 100 hours,
when used in normal items. A consumer organization tests this claim by taking
a random sample of 100 of such batteries. The batteries in the sample lasted, in
avcrage, 99.5 hours, with SD of 2 hours. The consumcr organization uses a z-test
with significance level of 1% to test the manufacturer's claim. What is the consumer
organization's conclusion?
2. The main products sold on an online app store are Appl and App2. The store
claims that 80% of Appl buycrs also buy App2. To test this claim you take a randon
sample of 400 Appl buyers. You find out that 78% of buyers in the sample bought
App2. Usc a 10% significance level z-test to determine if the store's claim is correct.
EGO

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