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Use Gauss’s approach to find the following sum
/in Questions Uploads /by Hannah WanguiMath principles are used throughout the Bible
/in Questions Uploads /by Hannah WanguiIn a random sample of 40 refrigerators, the mean repair cost was $144.00
/in Questions Uploads /by Hannah WanguiQuestion
In a random sample of 40 refrigerators, the mean repair cost was $144.00 and the
population standard deviation is $18.50.
A 90% confidence interval for the population mean repair cost is (139.19,148.81).
Change the sample size to n=80. Construct a 90% confidence interval for the population mean repair cost. Which confidence interval is wider? Explain.
Construct a 90% confidence interval for the population mean repair cost.
The 90% confidence interval is ( __ ,__ ).
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