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Essentials of Biostatistics in Public Health, Fourth Edition Chapter 9 Question 21
Essentials of Biostatistics in Public Health, Fourth Edition 9.7 Practice Problems 21. A study
evaluated predictors of perceived risk of infection with COVID19 (the outcome) by generational
birth cohort (the primary independent variable), gender, race/ethnicity, urbanicity, family
income, and political affiliation. The regression coefficients from the multiple linear regression
model associated with generational birth cohort are summarized here, with Millennials (24-39
years of age) considered the reference group: Gen X ( 40 55 years of age) 7.1 ( 95% Cl : 12.6 ,
1.5 ) , Baby Boomers (56-74 years of age) 10.6 (95% Cl: 16.2 , 5.0 ) . Which of the following is
not true? a. There is a statistically significant difference in perceived risk of infection with
COVID-19 between Gen X and Millennials. b. There is a statistically significant difference in
perceived risk of infection with COVID-19 between Baby Boomers and Millennials. c. There is a
statistically significant difference in perceived risk of c. There is a statistically significant
difference in perceived risk of infection with COVID-19 by generation birth cohort. d. There is a
statistically significant difference in perceived risk of infection with COVID-19 between Gen X
and Baby Boomers.

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