Introduction to Statistics and Data Analysis
5th Edition
ISBN: 9781305115347
Author: Roxy Peck; Chris Olsen; Jay L. Devore
Publisher: Brooks Cole
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Textbook Question
Chapter 2, Problem 73CR
According to the article “Effect of Preparation Methods on Total Fat Content, Moisture Content, and Sensory Characteristics of Breaded Chicken Nuggets and Beef Steak Fingers” (Family and Consumer Sciences Research Journal [1999]: 18-27), sensory tests were conducted using 40 college student volunteers at Texas Women’s University. Give three reasons, apart from the relatively small
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The article "Vehicle-Arrival Characteristics at Urban Uncontrolled Intersections" (V.
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Percentile
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If a histogram for speeds of vehicles through intersection A were drawn, would it most
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a.
“Are Women Really More Talkative Than Men?” is the title of an article that appeared in the journal Science. In the article, Mehl, Vazire, Ramirez-Esparza, Slatcher, & Pennebaker (2007) report the results of a study of 396 men and women. Each participant wore a microphone that recorded every word he or she uttered. The researchers counted the number of words uttered by men and women and compared them. The data below are fictional but they re-create the pattern that Mehl and colleagues observed:
Men: 16,345 17,222 15,646 14,889 16,701
Women: 17,345 15,593 16,624 16,696 14,200
Conduct steps for hypothesis testing.
Calculate the 95% confidence interval.
(MX - MY)lower = -1481.575
(MX - MY)upper = 1343.575
Speed, size and strength are thought to be important factors in football performance. The paper “Physical and Performance Characteristics of NCAA Division I Football Players” (Research Quarterly for Exercise and Sport (1990): 395-401) reported on physical characteristics of Division I starting football players in the 1988 football season. Information for teams ranked in the top 30 was easily obtained, and it was reported that the mean weight of starters on top-30 teams was 110 kg. A sample of 23 starting players (various positions were represented) from Division I teams that were not ranked in the top 20 resulted in a sample mean of 103.3 kg and a sample standard deviation of 16.3 kg. Is there sufficient evidence to conclude that the mean weight for non-top-20 starters is less than the known value for top-20 teams? Conduct hypothesis test using α=.01
Chapter 2 Solutions
Introduction to Statistics and Data Analysis
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