An educational psychologist was interested in time management by students. She had a theory that students who did well in school spent less time involved with online social media. She found out, from the American Social Media Research Collective, that the average American high school student spends 18.68 per week using online social media. She then obtained a sample of 31 students who had been named the valedictorians of their high schools. These valedictorians spent an average of 16.24 hours using online social media every week. Their standard deviation was 6.80. Use alpha of .05 and a two-tailed test to determine whether valedictorians spent a different amount of time on social media.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.6: Summarizing Categorical Data
Problem 10CYU
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An educational psychologist was interested in time management by students. She had a theory that students who did well in school spent less time involved with online social media. She found out, from the American Social Media Research Collective, that the average American high school student spends 18.68 per week using online social media. She then obtained a sample of 31 students who had been named the valedictorians of their high schools. These valedictorians spent an average of 16.24 hours using online social media every week. Their standard deviation was 6.80. Use alpha of .05 and a two-tailed test to determine whether valedictorians spent a different amount of time on social media.

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