manufacturer of kitchen water filters claims that their new model of water filter will, on average, treat more than 500 gallons of water before the water quality falls below acceptable levels. Consumer Reports wants to confirm this claim and selects a simple random sample of 60 filters for testing. Water was passed through each filter until the water quality dropped below acceptabl
manufacturer of kitchen water filters claims that their new model of water filter will, on average, treat more than 500 gallons of water before the water quality falls below acceptable levels. Consumer Reports wants to confirm this claim and selects a simple random sample of 60 filters for testing. Water was passed through each filter until the water quality dropped below acceptabl
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter4: Equations Of Linear Functions
Section: Chapter Questions
Problem 8SGR
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A manufacturer of kitchen water filters claims that their new model of water filter will, on average, treat more than 500 gallons of water before the water quality falls below acceptable levels. Consumer Reports wants to confirm this claim and selects a simple random sample of 60 filters for testing. Water was passed through each filter until the water quality dropped below acceptable levels and the volume of water measured. This produced a sample average of 575 gallons, and a sample standard deviation of 60 gallons. Construct a null and alternate hypothesis that Consumer Reports should use to confirm the manufacturer’s claim. Based on the sample data, what can they conclude? Use a 0.05 level of significance. Would your answer change if you used a 1% level of significance?
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When i run the calculation to find the test statistic value (t), I do not get the same t-value answer. I get a value of 9.6825 and not 3.227. Can you explain how you got the 3.227
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