For a random sample of 500 students aged 15-17 in the United States, the numbers of hours a week usually spent on talking on a phone are summarized below for female students and male students. (Source of data: Census at School - United States). Group Sample size Sample mean Sample standard deviation Female 277 4.07 10.6 Male 223 2.13 4.3 (The distribution of numbers of hours a week usually spent on talking on a phone for female students has the standard deviation greater than the mean, because it is right skewed and has many severe outliers).
For a random sample of 500 students aged 15-17 in the United States, the numbers of hours a week usually spent on talking on a phone are summarized below for female students and male students. (Source of data: Census at School - United States). Group Sample size Sample mean Sample standard deviation Female 277 4.07 10.6 Male 223 2.13 4.3 (The distribution of numbers of hours a week usually spent on talking on a phone for female students has the standard deviation greater than the mean, because it is right skewed and has many severe outliers).
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section: Chapter Questions
Problem 25SGR
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a) Identify the population parameters and state the hypotheses of the two-sided significance test comparing two population means.
b) Calculate the test statistic.
c) Explain how to make a conclusion for the significance test described in part a, using the 0.01 significance level. Interpret your conclusion in context.
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