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A simple random sample of 50 items resulted in a sample mean of 25. The population...

A simple random sample of 50 items resulted in a sample mean of 25. The population standard deviation is

σ = 5.

(Round your answers to two decimal places.)

(a) What is the standard error of the mean,  σx?

(b) At 95% confidence, what is the margin of error?

math   Statistics-And-Probability   
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Answer #1

Given no of itemslhf so mean l = standal deviation (o)=5 @ Standal Error of mean 11 şi 19 S.E= کے Vso 528 = 0.707 S.E=0.707 A

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