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19 July, 21:00

A random sample of 20 items is selected (from a population with an unknown population standard deviation). When computing a confidence interval for the population mean, what number of degrees of freedom should be used to determine the appropriate t-value?

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  1. 19 July, 22:26
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    degree of freedom is 19

    Step-by-step explanation:

    Given data

    sample = 20

    to find out

    degree of freedom

    solution

    we know degree of freedom formula

    that is

    degree of freedom = sample - 1

    we have given sample 20

    so

    degree of freedom = 20 - 1

    so degree of freedom is 19
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