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Statistics and Probability

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Moderate

Testing Two Independent Samples

STATS-REUSKR

When testing two independent samples if the populations are normally distributed, but the population variances are unknown, what is the test statistic used as the basis for statistical inferences about the difference in two population means?

A

$z$-statistic

B

$t$-statistic

C

$chi$-square value

D

$F$-statistic