In forming a 90% confidence interval for a population mean from a sample size of 22,the number of degrees of freedom from the t distribution equals 22.

Name: In forming a 90% confidence interval for a population mean from a sample size of 22,the number of degrees of freedom from the t distribution equals 22.
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The number of degrees of freedom for a t distribution in this case would be 21, since it is calculated as the sample size minus one (n-1).

In Forming a 90% Confidence Interval for a Population Mean