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Chapter 9: Q.99 (page 592)

The reason we use tprocedures instead of zprocedures when carrying out a test about a population mean is that

(a) zcan be used only for large samples.

(b)zrequires that you know the population standard deviation 蟽.

(c) zrequires you to regard your data as an SRS from the population.

(d) zapplies only if the population distribution is perfectly Normal.

(e) zcan be used only for confidence intervals.

Short Answer

Expert verified

The reason we use tprocedures instead of zprocedures when carrying out a test about a population mean is that (c)z requires you to regard your data as an SRS from the population.

Step by step solution

01

Step-1 Given Information

Given in the question that The reason we use tprocedures instead of zprocedures when carrying out a test about a population mean is that we have to fin out taht which option is correct.

02

Step-2 Explanation

There are two tests ztest and ttest. The reason of using the tprocedures instead of ztest is required to discuss here.

z-test and t-test are defined as statistical procedures that are used to determine whether the sample mean differs from the population mean or not. It must be noted that z-test is preferred to use when the standard deviation of the population is given, and t-test is used the standard deviation of the population is not given.

The correct option is (c).

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