Find the critical value for a lefttailed ztest with signific

Find the critical value for a left-tailed z-test with significance alpha = 0.02 and n = 75.

Solution

critical value for a left tailed z test

is

For normal distribution sample size is not required as no degrees of freedom.

When alpha = 0.02

z<-2.055

Hence z crit = -2.055

and Z < -2.055