Calculate the test statistic

Question

Testing:

H0:μ=52

H1:μ<52

Your sample consists of 81 subjects, with a mean of 51.4 and standard deviation of 1.2.

Calculate the test statistic, rounded to 2 decimal places.

t=________

Answer 1

Use the t-score formula to find the test statistic.

t = (X - μ) / (σ/√n) = (51.4 - 52) / (1.2/√81) = -4.5