Two Independent Samples of Sizes 30 and 35 Are Randomly $t$

question 23

Short Answer

Two independent samples of sizes 30 and 35 are randomly selected from two normal populations with equal variances. Which of the following is the test statistic that should be used to test the difference between the population means? A. Student $t$ with 64 degrees of freedom.
B. Chi-square
C. Z
D. Student $t$ with 63 degrees of freedom.

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Definitions:

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