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The Number of Phone Calls Arriving at a Switchboard Each

Question 23

Multiple Choice

The number of phone calls arriving at a switchboard each hour has been recorded,and the following frequency distribution has been developed. The number of phone calls arriving at a switchboard each hour has been recorded,and the following frequency distribution has been developed. What is the cumulative frequency of the third class? A) 80 B) 0.40 C) 155 D) 75 E) 105 What is the cumulative frequency of the third class?


A) 80
B) 0.40
C) 155
D) 75
E) 105

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