Three Statistics Classes (50 Students Each)took the Same Test

question 17

Multiple Choice

Three statistics classes (50 students each) took the same test.Shown below are histograms of the scores for the classes.Use the histograms to answer the question.
-Which class had the smallest IQR?

• A)Class 3,because the shape is symmetric and unimodal.
• B)Class 3,because the shape has the highest number of students.
• C)Class 2,because the shape is skewed.
• D)Class 1,because the shape is fairly symmetric and uniform.
• E)None,because all the classes had the same IQR.

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Definitions:

Confidence Interval

A spectrum of numeric values, arising from sample statistics, viewed as likely to encircle the value of an unexposed population parameter.

Weekly Time

The amount of time, calculated on a weekly basis, devoted to a specific activity or task.

Standard Deviation

A metric utilized to determine the extent of spread or variability within a collection of data points.

Confidence Interval

A range of values, derived from sample statistics, that is believed, with a certain probability, to contain the true value of a population parameter.