Unformatted text preview: differences in sample proportions? 2 Gallup, Inc. (2008). Wives still do laundry, men do yard work. Retrieved from www.gallup.com/poll/106249/wives
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work.aspx. © 2011 THE CARNEGIE FOUNDATION FOR THE ADVANCEMENT OF TEACHING A PATHWAY THROUGH STATISTICS, VERSION 1.6, STATWAY™
STUDENT HANDOUT STATWAY STUDENT HANDOUT  7 Lesson 9.1.2 Using Technology to Explore the Sampling Distribution of the Differences in Two Proportions 5 Give the value for !! − !! based on the information in Question 1. 6 Using the mean and standard error from Questions 3 and 4, what is the Z
score for the observed difference in sample proportions? 7 Is this a very unusual result? 8 What is the probability of observing a difference in sample proportions at least as low as the one observed in the survey? (Hint: Use the Z
score from Question 6). 9 Do these sample data lead you to doubt the original claim, that the true proportion of husbands and wives who pay the bills is equal? +++++ This lesson is part of STATWAY™, A Pathway Through College Statistics, which is a product of a Carnegie Networked Improvement Community that seeks to advance student success. Version 1.0, A Pathway Through Statistics, Statway™ was created by the Charles A. Dana Center at the University of Texas at Austin under sponsorship of the Carnegie Foundation for the Advancement of Teaching. This version 1.5 and all subsequent versions, resu...
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