It has often been suggested that students study 2 hours per week outside of clas
ID: 3131148 • Letter: I
Question
It has often been suggested that students study 2 hours per week outside of class for every credit hour a class is worth. For example, students taking a 3 hour class are expected to study 6 hours for that class per week outside of class. A student wondered if her fellow classmates followed that guideline. She randomly sampled 100 students from her university and asked each to estimate the number of hours they studied outside of class each week (on average) that term and the number of credit hours they were taking that term. A 95% confidence interval for the average number of hours studied outside of class per week per credit hour taken for students at this university is (1.8,2.4). Based on this confidence interval, which of the following is true?
A. Because 2 is between the bounds of the confidenceinterval, it does not appear that students at this university are studying the recommended 2 hours per week per credit hour, on average.
B. Because 2 is between the bounds of the confidenceinterval, it appears that students at this university are studying the recommended 2 hours per week per credit hour, on average.
C. Because the bounds of the confidence interval are above 0, it appears that students at this university are studying the recommended 2 hours per week per credit hour, on average.
D. Because the bounds of the confidence interval are above 0, it does not appear that students at this university are studying the recommended 2 hours per week per credit hour, on average
Explanation / Answer
Answer: B, Actually on average students are studying 2.1 hours per week with a variation of 2.3428
Note: D is also correct for the sake of judgement, We cant say that students at this university are studying the recommended 2 hours per week per credit hour, on average
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