Mathematics, 06.05.2020 02:23 bluehaze

Which of the following is the correct test statistic to employ when conducting the hypothesis test on differences in population means when samples of size n1 and n2 both > 30 are randomly, independently drawn with known population variances?
a. F-statistic
b. Z-statistic CORRECT
c. Durbin-Watson statistic
d. T-statistic

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