A Statistics Professor Has 115 Students in a Statistics Class

question 29

Multiple Choice

A statistics professor has 115 students in a statistics class and would like to estimate the number of hours each student studied for the last exam. A random sample of 24 students was found to study an average of 6.8 hours with a standard deviation of 2.2 hours. The 90% confidence interval to estimate the average number of hours studying for the exam is ________.

• A)(5.79, 7.81)
• B)(5.86, 8.74)
• C)(6.69, 6.91)
• D)(6.11, 7.49)

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