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C D ezto.mheducation.com/hm.tpx pps G Chrome PrimeWire l 10hanne M GmaiImported From E Dis Blackboad Leam DMYISU M MGra connect BUSINESS STATISTICS inal Exam Question 7 fof 18) save & E | Time remalni value 15.00 points Exercise 9-12 (L09-2) The U.S Dairy Industry wants to estimate the mean yearly milk consumption A sample of 28 people reveals the mean gallons the population distribution is normal (Use LDistribution lable a-1. What is the value of the population mean? G 65 20 a-2. What is the best estimate of this value? Estimate population mean c. For a 99% confidence interval, what is the value of t? (Round your answer to 3 decimal places.) Value of f d. Develop the 99% confidence interval for the population mean (Round your answers to 3 decimal places.) Confidence interval for the population mean is Would it be reasonable ta canclude that the popuilation mean is 50 gallons? and Yes O It is not possible to tell O NoExplanation / Answer
Ans:
a-1)population mean is unknown.
a-2)best estimate=sample mean=65
c)df=28-1=27
critical t value=tinv(0.01,27)=2.771
d)
99% Confidence interval for population mean
=65+/-2.771*20/sqrt(28)
=65+/-10.472
=(54.528,75.472)
e)As,CI does not include 50,so it is not reasonable to conclude that population mean is 50 gallons.
No.
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