Author Question: If the underlying populations are normally distributed and both population variances are equal, the ... (Read 90 times)

ddddddddddeeee4444 · **on:** Feb 26, 2023

Question 1

If the process of selecting individuals or objects in sample 1 has no effect on, or no relation to, the selection of individuals or objects in sample 2, the samples are:

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independent.

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dependent.

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discrete.

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paired.

Question 2

If the underlying populations are normally distributed and both population variances are equal, the test statistic

\(\style{font-family:Times New Roman;}{\frac{{\overline X}_1-{\overline X}_2-\Delta_0}{S_p^2\sqrt{\frac1{n_1}+\frac1{n_2}}}}\)

follows a:

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standard normal distribution if both samples are large.

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Student’stdistribution with\(\style{font-family:Times New Roman;}{n-1}\)degrees of freedom.

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standard normal distribution with\(\style{font-family:Times New Roman;}{n_1+n_2-2}\)degrees of freedom.

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Student’stdistribution with\(\style{font-family:Times New Roman;}{n_1+n_2-2}\)degrees of freedom.

breounasmoot · **Reply #1 on:** Feb 26, 2023

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