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Variance of the sample mean

A certain type of thread is manufactured with a mean tensile strength of 78.3 kilograms and a standard deviation of 5.6 kilograms. How is the variance of the sample mean changed when the sample size is?

(a) Increased from 64 to 196?

(b) Decreased from 784 to 49?

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Solution Preview :

Prepared by a verified Expert

Finance Basics: Variance of the sample mean

Reference No:- TGS0681490

Have a Question? (oR Write a Review)

Recent Questions Asked Finance Basics

Q : Calculate all forecasting smoothing methods

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Q : What proportion of families expected to have three boys

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Solution Preview :

Prepared by a verified Expert

Finance Basics: Variance of the sample mean

Reference No:- TGS0681490

Recent Questions Asked Finance Basics

Q : Calculate all forecasting smoothing methods

Q : Calculation regarding mean and median

Q : What proportion of families expected to have three boys

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