Introduction to Statistics and Data Analysis

5th Edition

ISBN: 9781305445963

Author: PECK

Publisher: Cengage

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2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.

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Textbook Question

Chapter 11.4, Problem 60E

The paper “Ready or Not? Criteria for Marriage Readiness among Emerging Adults” (Journal of Adolescent Research [2009]: 349–375) surveyed emerging adults (defined as age 18 to 25) from five different colleges in the United States. Several questions on the survey were used to construct a scale designed to measure endorsement of cohabitation. The paper states that “on average, emerging adult men (M = 3.75, SD = 1.21) reported higher levels of cohabitation endorsement than emerging adult women (M = 3.39, SD =1.17).” The sample sizes were 481 for women and 307 for men.

a. Carry out a hypothesis test to determine if the reported difference in sample means provides convincing evidence that the mean cohabitation endorsement for emerging adult women is significantly less than the mean for emerging adult men for students at these five colleges.
b. What additional information would you want in order to determine whether it is reasonable to generalize the conclusion of the hypothesis test from Part (a) to all college students?

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Chapter 11.4, Problem 59E

Chapter 11, Problem 61CR

Chapter 11 Solutions

Introduction to Statistics and Data Analysis

Ch. 11.1 - Consider two populations for which 1 = 30, 1 = 2,...Ch. 11.1 - An individual can take either a scenic route to...Ch. 11.1 - Prob. 3E Ch. 11.1 - Prob. 4E Ch. 11.1 - The article Plugged In, but Tuned Out (USA TODAY,...Ch. 11.1 - Prob. 6E Ch. 11.1 - Prob. 7E Ch. 11.1 - The paper If Its Hard to Read, Its Hard to Do...Ch. 11.1 - Is injecting medical cement effective in reducing...Ch. 11.1 - Prob. 10E

Ch. 11.1 - Prob. 11E Ch. 11.1 - The paper Mood Food: Chocolate and Depressive...Ch. 11.1 - Prob. 13E Ch. 11.1 - Example 11.1 looked at a study comparing students...Ch. 11.1 - Prob. 15E Ch. 11.1 - Prob. 16E Ch. 11.1 - A newspaper story headline reads Gender Plays Part...Ch. 11.1 - Prob. 18E Ch. 11.1 - Fumonisins are environmental toxins produced by a...Ch. 11.1 - A researcher at the Medical College of Virginia...Ch. 11.1 - Do certain behaviors result in a severe drain on...Ch. 11.2 - Suppose that you were interested in investigating...Ch. 11.2 - Head movement evaluations are important because...Ch. 11.2 - To determine if chocolate milk was as effective as...Ch. 11.2 - The humorous paper Will Humans Swim Faster or...Ch. 11.2 - The study described in the paper Marketing Actions...Ch. 11.2 - Prob. 27E Ch. 11.2 - The paper Less Air Pollution Leads to Rapid...Ch. 11.2 - The paper The Truth About Lying in Online Dating...Ch. 11.2 - Prob. 30E Ch. 11.2 - Prob. 31E Ch. 11.2 - The paper Quantitative Assessment of Glenohumeral...Ch. 11.2 - Two proposed computer mouse designs were compared...Ch. 11.2 - Prob. 34E Ch. 11.2 - Prob. 35E Ch. 11.2 - The authors of the paper Ultrasound Techniques...Ch. 11.3 - Some people seem to believe that you can fix...Ch. 11.3 - Prob. 38E Ch. 11.3 - After the 2010 earthquake in Haiti, many...Ch. 11.3 - Prob. 40E Ch. 11.3 - The report Audience Insights: Communicating to...Ch. 11.3 - Prob. 42E Ch. 11.3 - Prob. 43E Ch. 11.3 - Prob. 44E Ch. 11.3 - The article Fish Oil Staves Off Schizophrenia (USA...Ch. 11.3 - The report Young People Living on the Edge...Ch. 11.3 - Prob. 47E Ch. 11.3 - Prob. 48E Ch. 11.3 - Prob. 49E Ch. 11.3 - Prob. 50E Ch. 11.3 - Prob. 51E Ch. 11.3 - The article Spray Flu Vaccine May Work Better Than...Ch. 11.3 - Prob. 53E Ch. 11.3 - The following quote is from the article Canadians...Ch. 11.3 - Prob. 55E Ch. 11.3 - Women diagnosed with breast cancer whose tumors...Ch. 11.3 - Prob. 57E Ch. 11.4 - The paper The Psychological Consequences of Money...Ch. 11.4 - An experiment to determine if an online...Ch. 11.4 - The paper Ready or Not? Criteria for Marriage...Ch. 11 - Prob. 61CR Ch. 11 - Prob. 62CR Ch. 11 - A deficiency of the trace element selenium in the...Ch. 11 - Prob. 64CR Ch. 11 - Prob. 65CR Ch. 11 - In a study of a proposed treatment for diabetes...Ch. 11 - When a surgeon repairs injuries, sutures (stitched...Ch. 11 - Prob. 68CR Ch. 11 - In a study of memory recall, eight students from a...Ch. 11 - As part of a study to determine the effects of...Ch. 11 - Prob. 71CR Ch. 11 - Prob. 72CR Ch. 11 - The article Truth and DARE: Tracking Drug...Ch. 11 - The article Softball Sliding Injuries (American...Ch. 11 - Prob. 75CR Ch. 11 - Wayne Gretzky was one of ice hockeys most prolific...Ch. 11 - Heres one to sink your teeth into: The authors of...Ch. 11 - Prob. 78CR Ch. 11 - Dentists make many people nervous. To see whether...Ch. 11 - Prob. 80CR Ch. 11 - Prob. 81CR Ch. 11 - Both surface soil and subsoil specimens were taken...

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Solution Summary: The author explains that the mean cohabitation endorsement for emerging adult women is significantly less than that of men.

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