Testing: H 0 : μ = 15.7 H 1 : μ < 15.7 Your sample consists of 35 subjects, with a mean of 14.7 and standard deviation of 3.36. Calculate the test statistic rounded to 2 decimal places.

Question

#4

Answer 1

Assuming all conditions are met for conducting a hypothesis test for means, we need to use specific formulas. Specifically, we need to calculate the z-statistic as the sample size is greater than 30:

z = (x̄-μ)/(σ/√n) = (14.7-15.7)/(3.36/√35) ≈ −1.76

Hence, the z-statstic is -1.76

Hope this helped!