The number of e-mails a friend received each day during the last 20 days is shown below. What number of days did she receive 19 or fewer e-mails in a day?
Emails
Frequency
Cumulative Frequency
0 to 9 4 4
10 to 19
7 11
20 to 29
4 15
30 to 39
4 19
40 to 49
1 20
(1 point)
Responses
7
11
12
15
3 answers
The number of days she received 19 or fewer emails in a day is 12. This can be calculated by adding the frequencies for emails in the ranges 0-9, 10-19, and 20-29, which is 4 + 7 + 4 = 15. Then, subtract the total number of days she received exactly 19 emails (frequency for 20-29 range) which is 15 - 3 = 12.
answer from the responses
The correct answer from the responses provided is 12.