Question

In: Statistics and Probability

a previous study of a large cross-section of students in this course showed that students studies...

a previous study of a large cross-section of students in this course showed that students studies 12 hours per week. Are the results of this current study statistically different than the assumption of 12 hours per week studying? Define the hypotheses and compare the t-value to the critical t value, evaluating at α = 0.05.

Previous Study:

A sample of students from an introductory business course were polled regarding the number of hours they spent studying for the last exam. All students anonymously submitted the number of hours on a 3 by 5 card. There were 24 individuals in the one section of the course polled. The data was used to make inferences regarding the other students taking the course. The data are shown below:4.522 7 14.59 9 3.58 11 7.518 20 7.59 10.515 19 2.55 9 8.514 20 8

a,Based on the sample results, find the 95% confidence interval.

b. Interpret the results.

c. Do you expect a 90% confidence

e interval to be wider or narrower and why?

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Expert Solution

orchestra answered 2 years ago
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