You wish to test the following claim (Ha) at a significance level a = 0.005

H₀ : μ = 65.2
Hₐ : μ > 65.2
You believe the population is normally distrubuted and you know standard deviation is σ = 12.6
You obtain a sample mean of M = 70.3 for a sample of size n = 63

What is the test statistic for this sample?