The following table gives the cumulative frequency distribution of the commuting time (in minutes) f
The following table gives the cumulative frequency distribution of the commuting time (in minutes) from home to work for a sample of 400 persons selected from a city
Time (minutes)
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0 to less than 10
60
0 to less than 20
157
0 to less than 30
221
0 to less than 40
291
0 to less than 50
351
0 to less than 60
400
The sample size is:
The percentage of persons who commute for less than 30 minutes, rounded to two decimal places, is:
%
The cumulative relative frequency of the fourth class, rounded to four decimal places, is:
The percentage of persons who commute for 40 or more minutes, rounded to two decimal places, is:
%
The percentage of persons who commute for less than 50 minutes, rounded to two decimal places, is:
%
The number of persons who commute for 20 or more minutes is:
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