In Testing the Difference Between Two Population Means, for Which

question 63

Short Answer

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? $\begin{array}{|l|l|}\hline A.&\text { Z-test. } \\\hline B.&\text { Pooled-variances } t \text {-test. } \\\hline C.&\text { Unequal variances } t \text {-test. } \\\hline D.&\text { Matched pars } t \text {-test. } \\\hline \end{array}$

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Definitions:

Sentinel Values

Sentinel values are special values in the context of computer programming and data processing that are used to mark or signal the end of a data structure, such as arrays or lists, without explicitly using data structure's size.

Sentinel Value

A sentinel value is a special value in the context of an algorithm which uses it to terminate a loop when it is encountered.