A researcher compares the height of male executives in the U.S.to the average height of males (µ = 67 inches).He determines that the average height of male executives is 70 inches (95% confidence interval [CI] 68-72).Based on this result,what would the decision have been for a hypothesis test?
A)Reject the null hypothesis.
B)Retain the null hypothesis.
C)There is not enough information to answer this question.

Question

Quizplus · Accepted Answer

The null hypothesis in this case would be that the average height of male executives is not significantly different from the average height of males (µ = 67 inches). The 95% confidence interval for the average height of male executives (68-72 inches) does not include the null hypothesis value (67 inches), indicating that it is significantly different from the population mean. Therefore, the researcher would reject the null hypothesis and conclude that male executives are significantly taller than the average male.

A Researcher Compares the Height of Male Executives in the U.S.to