单项选择题

The number of class intervals in a frequency distribution is usually between （）.

A.3 and 5
B.7 and 9
C.5 and 15
D.1 and 25

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单项选择题

A.an ogive
B.a histogram
C.a frequency polygon
D.a stem and leaf plot

单项选择题

A.midpoint frequency
B.cumulative frequency
C.stem and leaf plot
D.relative frequency

单项选择题

A.ogive
B.histogram
C.frequency distribution
D.stem and leaf plot