TABLE 2-5 The following are the duration in minutes of a sample of long-distance
ID: 2923168 • Letter: T
Question
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 Time (in Minutes 0 but less than5 5 but less than 1O 10 but less than 15 15 but less than 20 20 but less than 25 25 but less than 30 30 or more Relative Frequenc 0.37 0.22 0.15 0.10 0.07 0.07 0.02 24) Referring to Table 2-5, what is the cumulative relative frequency for the percentage of calls that lasted less than 20 minutes?Explanation / Answer
24) The cumulative relative frequency for the percentage of calls that lasted less than 20 minutes
= 0.37 + 0.22 + 0.15 + 0.10
= 0.84
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