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Using the simple random sample of weights of women from a data​ set, we obtain these...

Using the simple random sample of weights of women from a data​ set, we obtain these sample​ statistics: n equals 35 and x overbar equals 147.88 lb. Research from other sources suggests that the population of weights of women has a standard deviation given by sigma equals 31.64 lb.

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 __ lb.

b. The 90% confidence interval estimate is__lb<u<__lb.

Math   Statistics-And-Probability   
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Answer #1

TOPIC:Confidence interval for the population mean.

So,the 90% confidence interval estimate is-- 139.55 lb < u < 156.21 lb.(Rounded to two decimal places)(ANSWER).

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