3rd Edition

ISBN: 9780135190210

Author: Gould

Publisher: PEARSON CO

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Correlation defines a relationship between two independent variables. It tells the degree to which variables move in relation to each other. When two sets of data are related to each other, there is a correlation between them.

Linear Correlation

A correlation is used to determine the relationships between numerical and categorical variables. In other words, it is an indicator of how things are connected to one another. The correlation analysis is the study of how variables are related.

Regression Analysis

Regression analysis is a statistical method in which it estimates the relationship between a dependent variable and one or more independent variable. In simple terms dependent variable is called as outcome variable and independent variable is called as p…

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Textbook Question

Chapter 7, Problem 80SE

Sugar-Sweetened Beverages In 2017, the journal Obesity reported on trends in sugar-sweetened beverage (SSB) consumption. A random sample of youths aged 12 to 19 years old were asked to monitor all food and beverages consumed in a 24-hour period. The study was done in 2003 and repeated in 2014. The numbers who consumed a sugary beverage such as soda or fruit juice in a day are shown in the table. (Bleich et al., “Trends in Beverage Consumption among Children and Adults, 2003-2014,” Obesity, vol. 26 [2018]: 432-441. doi:10.1002/oby.22056)

Chapter 7, Problem 80SE, Sugar-Sweetened Beverages In 2017, the journal Obesity reported on trends in sugar-sweetened

a. Calculate and compare the percentages of youths in this age group who consumed an SSB during the recording period.

b. Check that the conditions for using a two-population confidence interval hold.

c. Find the 95 % confidence interval for the difference in the proportion of youth consuming an SSB in 2003 and 2014. Based on your confidence interval, do you think there has been a change in sugar-sweetened beverage consumption among this age group? Explain.

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Chapter 7, Problem 79SE

Chapter 7, Problem 81SE

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Chapter 7 Solutions

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Solution Summary: The author compares the required percentages of youth who consumed SSB in 2003 and 2014.

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