It is known that the population standard deviation of weight among females is 15. Assuming that...
It is known that the population standard deviation of weight among females is 15. Assuming that we have a random sample of 136 and a sample mean of 125, what would be your 90% confidence interval estimate of the population mean weight? (Hint: use 1.65 as the critical z-value)
Homework Answers
We have given that,
Sample mean =125
Population standard deviation=15
Sample size=136
Z critical value (by using Z table) =
1.65
Confidence interval formula is
=(122.88, 127.12)
Lower confidence limit =122.88
Upper confidence limit =127.12
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