In testing the difference between two population means, for which the population variances are unknown and are not assumed to be equal, two independent samples of large sizes are drawn from the populations. Which of the following tests is appropriate? $\begin{array}{|l|l|}
\hline A.&\text { Z-test. } \
\hline B.&\text { Pooled-variances } t \text {-test. } \
\hline C.&\text { Unequal variances } t \text {-test. } \
\hline D.&\text { Matched pars } t \text {-test. } \
\hline
\end{array}$

Question

In testing the difference between two population means, for which the population variances are unknown and are not assumed to be equal, two independent samples of large sizes are drawn from the populations. Which of the following tests is appropriate? $\begin{array}{|l|l|}
\hline  A.&\text { Z-test. } \
\hline  B.&\text { Pooled-variances } t \text {-test. } \
\hline  C.&\text { Unequal variances } t \text {-test. } \
\hline  D.&\text { Matched pars } t \text {-test. } \
\hline 
\end{array}$

Quizplus · Accepted Answer

The Answer of In testing the difference between two population means, for which the population variances are unknown and are not assumed to be equal, two independent samples of large sizes are drawn from the populations. Which of the following tests is appropriate? $\begin{array}{|l|l|}
\hline  A.&\text { Z-test. } \
\hline  B.&\text { Pooled-variances } t \text {-test. } \
\hline  C.&\text { Unequal variances } t \text {-test. } \
\hline  D.&\text { Matched pars } t \text {-test. } \
\hline 
\end{array}$

In Testing the Difference Between Two Population Means, for Which