A Sample of Experienced Typists Revealed That Their Mean Typing

question 29

Multiple Choice

A sample of experienced typists revealed that their mean typing speed is 87 words per minute and the median typing speed is 73 words per minute. The standard deviation of typing speed is 16.9 words per minute. What is the Pearson coefficient of skewness?

• A)−2.5
• B)−4.2
• C)+4.2
• D)+2.5

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Definitions:

Independent Variable

A variable that is manipulated to determine if it causes any change to a dependent variable in an experiment.

Dependent Variable

The variable in an experiment or model that is expected to change in response to changes in the independent variable(s).

Scatterplot

A type of plot or mathematical diagram using Cartesian coordinates to display values for typically two variables for a set of data, showing the relationship between them.

Variables

Elements, characteristics, or conditions that can change or vary in a mathematical or statistical experiment.