TABLE 2-5 The Following Are the Duration in Minutes of a Sample

Multiple Choice

TABLE 2-5
The following are the duration in minutes of a sample of long-distance phone calls made within the continental United States reported by one long-distance carrier.
-Referring to Table 2-5, what is the cumulative relative frequency for the percentage of calls that lasted under 20 minutes?

A) 0.10
B) 0.59
C) 0.76
D) 0.84