A professor claims the mean amount of time students spend at tutoring per week i

Question

A professor claims the mean amount of time students spend at tutoring per week is less than 60 minutes. She samples 50 students and finds the mean time spent is 54 minutes with a standard deviation of 18 minutes. Test the professors claim. 1. what are the null and alternative hypothesis? 2. Calculate the test statistic. Use the following information to answer questions 26 and 27 A professor claims the mean amount of time students spend at tutoring per week is less than 60 minutes. She samples 50 students and finds the mean time spent is 54 minutes with a standard deviation of 18 minutes. Test the professors claim. . What are the null and alternative hypothesis? A. Ho: ? 54 . H1 : ? 54 C. Ho: ? 60,11,: ? 60 Calculate the test statistic. A. 2.36 B. 1.87 C. -2.36 D. 1.87 E. 2.36

Explanation / Answer

Sol:

SInce sample stdeviation is known use t statistic

t=xbar-mu/s/sqrt(n)

=54-60/18/sqrt(50)

t =-2.36

OPTION C

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