Ackerman and Goldsmith (2011) found that students who studied text from printed hardcopy had better test scores than students who studied from text presented on a screen. In a related study, a professor noticed that several students in u large class had purchased the e-book version of the course textbook. Few the final exam, the overall average for the entire class was μ = 81.7 but the n = 9 students who used e-books had a mean of M – 77.2 with a standard division of s – 5.7. a. Is the sample sufficient to conclude that scores for students using e-books were significantly different from scores for the regular class? Use a two-tailed lest with α = 0.5. b. Construct the 90% confidence interval to estimate the mean exam score if the entire population used e-books. c. Write a sentence demonstrating how the results from the hypothesis test and the confidence interval would appear in a research report.

Essentials of Statistics for the B...

8th Edition
Frederick J Gravetter + 1 other
Publisher: Cengage Learning
ISBN: 9781133956570

Essentials of Statistics for the B...

8th Edition
Frederick J Gravetter + 1 other
Publisher: Cengage Learning
ISBN: 9781133956570

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Chapter 9, Problem 17P
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