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Question

Your sample consists of 38 subjects, with a mean of 30.2 and a sample standard deviation (s) of 1.86.

Calculate the test statistic, rounded to 2 decimal places.

t=

Answer 1

The test statistic would be z = ( sample mean - theoretical population mean) / sample standard deviation.

So this would give you z = (30.2 - 31.1) / 1.86 = -0.48.