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Essentials of Statistics for the B...

8th Edition
Frederick J Gravetter + 1 other
ISBN: 9781133956570

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BuyFindarrow_forward

Essentials of Statistics for the B...

8th Edition
Frederick J Gravetter + 1 other
ISBN: 9781133956570
Textbook Problem

The following sample was obtained from a population with unknown parameters.

Scores: 6, 12, 0, 13, 4, 7

a. Compute the sample mean and Standard deviation. (Note that these are descriptive values that summarize the sample data.)

b. Compute the estimated standard error for M. (Note that this is an inferential value that describes how accurately the sample mean represents the unknown population mean.)

a.

To determine

To Find: Sample mean and standard deviation for the scores given.

Explanation

Given info:

A sample with 6 scores is provided in the question as: 6, 12, 0, 13, 4, 7 and parameters of the population are unknown.

Calculation:

Sum of scores, is X=6+12+0+13+4+7

Calculate sample mean using formula:

M=Xn

Substitute X=6+12+0+13+4+7 and n=6 in the formula

M=426=7

Now, formula for standard deviation is:

s=(xM)2n

b.

To determine

To find: The estimated standard error for mean.

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