A company is in the early stages of developing an eco-friendly laundry machine that will use less
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A company is in the early stages of developing an eco-friendly laundry machine that will use less water than the competition. A team has conducted a study to determine the mean number of gallons of water used by washing machines when completing a washing cycle. The number of cycles is approximately normally distributed. A sample of 8 washing machines leads to an average of 15.37 gallons and a standard deviation of 1.30. With this information, a team member incorrectly built a confidence interval using a z-score. Will the Z confidence interval have a longer or shorter length than a t confidence interval? Explain.
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A confidence interval is a range of values that is used to estimate an unknown population parameter ...View the full answer
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Related Book For 
Principles Of Managerial Statistics And Data Science
ISBN: 9781119486411
1st Edition
Authors: Roberto Rivera
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