1.

The record of daily shipment is 34, 35, 41, 30, 55, 45, 30, 34, 32, 52, 42, 40, 60, 36, 38, 48, 56, 53, 34, 33, 32, 41, 55, 59, 34, 51, 54, 53, 36, then the range of values to calculate class interval is

A. 90
B. 30
C. 2
D. 1800
Answer» C. 2


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