If About Two-Thirds of the Cases in a Research Study

question 68

Multiple Choice

If about two-thirds of the cases in a research study fall within 1 standard deviation from the mean,and 95 percent within 2 standard deviations,researchers know that their data form a

• A)skewed distribution.
• B)plot.
• C)normal curve.
• D)bar graph.

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Definitions:

Null Hypothesis

A hypothesis in statistical analysis that proposes there is no significant difference or relationship between specified populations, any observed difference being due to sampling or experimental error.

Groups

Sets of subjects or variables categorized together for analysis or study.

Null Hypothesis

A hypothesis that states there is no significant difference or relationship between specified populations, any observed difference being due to sampling or experimental error.

Groups

In research, these refer to sets of subjects or items that have been separated based on characteristics or treatment conditions for analysis.