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问答题
问答题
问答题
平均废品率=1.63%
单项选择题
A.80
B.200
C.20
D.100
单项选择题
A.80
B.0.40
C.155
D.75
单项选择题
A.a graph of a frequency distribution
B.a running total of the frequencies in the classes
C.the proportion of the total frequencies which fall into each class
D.a very cloudy picture of the frequencies
单项选择题
A.histogram
B.ogive
C.stem and leaf chart
D.pie chart
单项选择题
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
单项选择题
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
单项选择题
A.3 and 5
B.7 and 9
C.5 and 15
D.1 and 25