Question: How is the standard deviation represented in a frequency distribution graph? a. By a vertical line located at a distance of one standard deviation above

How is the standard deviation represented in a frequency distribution graph?

a. By a vertical line located at a distance of one standard deviation above the mean.

b. By two vertical lines located one standard deviation above the mean and one standard deviation below the mean.

c. By a horizontal line or arrow extending from a location one standard deviation above the mean to a location one standard deviation below the mean.

d. By a horizontal line or arrow extending from the mean for a distance equal to one standard deviation.

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