SOLUTION: Using the simple random sample of weights of women from a data set, we obtain these sample statistics: n=45 and x-bar =141.71 lbs. Research from other sources suggest that the popu

Question 800815: Using the simple random sample of weights of women from a data set, we obtain these sample statistics: n=45 and x-bar =141.71 lbs. Research from other sources suggest that the population of weights of women has a standard deviation given by o=32.44 lbs.
a) Find the best point estimate of the mean weight of all women.
b) Find a 90% confidence interval estimate of the mean weight of all women
a) The best point estimate is ______.
b) The 90% confidence interval estimate is ____lbs< mu <_____lbs.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Using the simple random sample of weights of women from a data set, we obtain these sample statistics: n=45 and x-bar =141.71 lbs. Research from other sources suggest that the population of weights of women has a standard deviation given by o=32.44 lbs.
a) Find the best point estimate of the mean weight of all women.
Ans: x-bar = 141.75
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b) Find a 90% confidence interval estimate of the mean weight of all women
E = 1.654*32.44/sqrt(45) = 8
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90% CI: 141.71-8 < mu < 141.71+8
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Cheers,
Stan H.
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