Fundamentals of Biostatistics
8th Edition
ISBN: 9781305268920
Author: Bernard Rosner
Publisher: Cengage Learning
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Chapter 8, Problem 24P
A study in Pittsburgh measured various cardiovascular risk factors in children at birth and during their first 5 years of life [6]. In particular, heart rate was assessed at birth, 5 months, 15 months, 24 months, and annually thereafter until 5 years of age. Heart rate was related to age, gender, race, and socioeconomic status. The data in Table 8.13 were presented relating heart rate to race among newborns.
Report a p-value for the test performed in Problem 8.23.
Table 8.13 Relationship of heart rate to race among newborns
Source: Reprinted with permission of the American Journal of Epidemiology, 119(4), 554–563.
Test for a significant difference in mean heart rate between Caucasian and African American newborns.
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A common way for two people to settle a frivolous dispute is to play a game of rock-paper-scissors. In this game, each person simultaneously displays a hand signal to indicate a rock, a piece of paper, or a pair of scissors. Rock beats scissors, scissors beats paper, and paper beats rock. If both players select the same hand signal, the game results in a tie.
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Consider the game of rock-paper-scissors to be an experiment. In the long run, roommate A chooses rock 21% of the time, and roommate B chooses rock 61% of the time; roommate A selects paper 39% of the time, and roommate B selects paper 21% of the time; roommate A chooses scissors 40% of the time, and roommate B chooses scissors 18% of the time. (These choices are made randomly and independently of each…
Chapter 8 Solutions
Fundamentals of Biostatistics
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