Two Independent Samples of Sizes 40 and 50 Are Randomly

question 38

Multiple Choice

Two independent samples of sizes 40 and 50 are randomly selected from two normally distributed populations. Assume that the population variances are known. In order to test the difference between the population means, µ1 - µ2, which of the following test statistics should be used?

• A)t-test
• B)Chi-square test
• C)z-test
• D)None of these choices are correct.

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