PH 521 - Biostatistics » Summer 2021 » Week 8 Quiz

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Question #1
I want to conduct a study to determine the single strongest predictor of housing prices: square footage, the presence of a swimming pool, or the standardized test scores of the students in the neighborhood. Which type of analysis should be run?
A.   Multivariate statistics
B.   Descriptive statistics
C.   Bivariate statistics
D.   None of the above
Question #2
The effectiveness of birth control pills can be reduced if a woman is taking antibiotics. This is an example of _________ effect.
A.   A confounding
B.   A correlational
C.   An interaction
D.   A bivariate
Question #3
Which statement is true if a predictor variable is strongly related to the dependent variable in a linear regression model?
A.   The regression line will be slanted upward
B.   The error sum of squares will be high
C.   The dots will line up closely to the regression line
D.   All of the above
Question #4
Correlation coefficient quantifies the association between two continuous variables and can range between –1 and +1.
A.   FALSE
B.   TRUE
Question #5
In logistic regression, the predictors are dichotomous, and the outcome is a continuous variable.
A.   TRUE
B.   FALSE

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