Asked Nov 5, 2019

The standard deviation of a normal distribution is 20. What is the standard error of the mean obtained by averaging 225 samples?


Expert Answer

Step 1


from the given information,

standard deviation(σ) =20.

Sample size(n) = 225.

Step 2

The standard error is the square root ...


Image Transcriptionclose

S.E 20 V225 =1.33


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