# Question

Shown here is a frequency distribution for the rise in tides at 30 selected locations in the United States.

Rise in tides (inches) Frequency

12.5â€“27.5 ..........6

27.5â€“42.5 ..........3

42.5â€“57.5 ..........5

57.5â€“72.5 ..........8

72.5â€“87.5 ..........6

87.5â€“102.5 ...........2

a. Mean

b. Modal class

c. Variance

d. Standard deviation

Rise in tides (inches) Frequency

12.5â€“27.5 ..........6

27.5â€“42.5 ..........3

42.5â€“57.5 ..........5

57.5â€“72.5 ..........8

72.5â€“87.5 ..........6

87.5â€“102.5 ...........2

a. Mean

b. Modal class

c. Variance

d. Standard deviation

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