Babcock and Marks (2010) reviewed survey data from 2003–2005, and obtained an average of mu = 14hor hours per week spent studying by full-time students at 4-year colleges in the United States. To determine whether this average has changed in the past 10 years , researcher selected a sample of n = 64 of today's college students and obtained an average of M = 12.5 hours . If the standard deviation for the distribution is sigma = 4.8 hours per week, does this sample indicate a significant change in the number of hours spent studying? Use a two-tailed test with alpha = .05 .
Babcock and Marks (2010) reviewed survey data from 2003–2005, and obtained an average of mu = 14hor hours per week spent studying by full-time students at 4-year colleges in the United States. To determine whether this average has changed in the past 10 years , researcher selected a sample of n = 64 of today's college students and obtained an average of M = 12.5 hours . If the standard deviation for the distribution is sigma = 4.8 hours per week, does this sample indicate a significant change in the number of hours spent studying? Use a two-tailed test with alpha = .05 .
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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7. Babcock and Marks (2010) reviewed survey data from 2003–2005, and obtained an average of mu = 14hor hours per week spent studying by full-time students at 4-year colleges in the United States. To determine whether this average has changed in the past 10 years , researcher selected a sample of n = 64 of today's college students and obtained an average of M = 12.5 hours . If the standard deviation for the distribution is sigma = 4.8 hours per week, does this sample indicate a significant change in the number of hours spent studying? Use a two-tailed test with alpha = .05 .
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