A Study Is Done to Assess the Effects of a New

question 15

Multiple Choice

A study is done to assess the effects of a new medication on the resting heart rate of dogs. Two breeds will be used in the study because of the availability of experimental subjects, even though the researcher is not interested in the differences in the medication's effectiveness between breeds. What type of experimental design should be used?

• A)no blinding; no blocking
• B)no blinding; blocking on dog breed
• C)double blind; no blocking
• D)double blind; blocking on dog breed

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Definitions:

Regression SSR

The sum of squared deviations of predicted values from the mean of the dependent variable in regression analysis, indicating the variability explained by the regression.

Standard Error

The standard deviation of the sampling distribution of a statistic, typically the mean.

Dependent Variable

A variable in an experiment or study whose changes are subject to the variations in other variables (independent variables).

Predicted Values

The values estimated based on a statistical model that represents the expected outcome for a given set of input variables.