Solve the Problem

question 25

Multiple Choice

Solve the problem. Round your answer to one decimal place unless otherwise indicated.
-When 12 long-distance runners were randomly selected and tested, a mean resting heart rate of 70.0 beats per minute was obtained. Based on this sample statistic, what is the best estimate for the mean resting heart rate for all long-distance runners?

• A)66.7 beats per minute
• B)68.3 beats per minute
• C)71.8 beats per minute
• D)70.0 beats per minute

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Definitions:

Experimenter Effects

Unintended influences that the experimenter's presence or actions may have on the results of an experiment.

Single-blind Studies

Experimental studies in which the participants do not know which experimental group they belong to (e.g., control or treatment), but the researchers do.

Dependent Variable

In an experiment, it is the variable that is tested and measured, expected to change as a result of manipulations of the independent variable.

Manipulates

To control or influence something or someone, often in a skillful manner and sometimes in a deceptive way.