If an Association Study Did Not Select People for the Study

question 27

Multiple Choice

If an association study did not select people for the study by using random sampling, which of the following statements is true?

• A)The association should be rejected as inconclusive.
• B)The study must be done again using the same participants.
• C)The effect size should be considered, but tests of statistical significance should not.
• D)The findings should be replicated in another population.

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Definitions:

Unbiased Estimators

Statistical estimators that, on average, correctly estimate the parameter of interest in the long run.

Population Regression Parameters

Population regression parameters are coefficients in a regression equation that describe the relationship between dependent and independent variables across an entire population.

Regression Analysis

A statistical method for examining the relationship between a dependent variable and one or more independent variables.

Least Squares Line

The least squares line refers to the line of best fit in linear regression, minimizing the sum of the squared differences between observed and predicted values.