單項選擇題Which of the following is best to show the percentage of a total budget that is spent on each category of items？（）

A.histogram
B.ogive
C.stem and leaf chart
D.pie chart


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1.單項選擇題One rule that must always be followed in constructing frequency distributions is that （）.

A.the number of classes must be less than 10
B.each data point can only fall into one class
C.the width of each class is equal to the range
D.the number of intervals must be an odd number

2.單項選擇題One advantage of a stem and leaf plot over a frequency distribution is that （）.

A.it contains more class intervals
B.the values of the original data are retained
C.the class midpoints are used as the stem
D.the class midpoints are used as the leaf

3.單項選擇題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

4.單項選擇題A cumulative frequency polygon is also called （）.

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

5.單項選擇題If the individual class frequency is divided by the total frequency, the result is the （）.

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