In a Simple Random Sample of 77 Families, the Mean

question 83

Multiple Choice

In a simple random sample of 77 families, the mean number of children is 2.2 with a standard deviation of 0.9. You wish to determine if the population mean differs from 2.1 children per family.
Determine the type of parameter to be tested and compute the test statistic.

• A) Test for a standard deviation; test statistic 454.1235
• B) t-test for the mean; test statistic 0.9750
• C) z-test for the mean; test statistic 0.9750
• D) Test for a proportion; test statistic 2.9250

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