An empirical probability distribution based on weekly study times for a sample of 40 students is provided to the right. Suppose one of those students was chosen randomly. In parts (a) through (d) below, using your distribution, find the probability that the study time in the past week for the student selected would have been in each of the following ranges.

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An empirical probability distribution based on weekly study times for a sample of 40 students is provided to the right. Suppose one of those students was chosen randomly. In parts (a) through (d) below, using your distribution, find the probability that the study time in the past week for the student selected would have been in each of the following ranges.
An empirical probability distribution based on weekly study times for a sample of 40 students is
provided to the right. Suppose one of those students was chosen randomly. In parts (a)
through (d) below, using your distribution, find the probability that the study time in the past week
for the student selected would have been in each of the following ranges.
(a) 30-39 hours
(Type an integer or a decimal.)
(b) 40-59 hours
(Type an integer or a decimal.)
(c) fewer than 30 hours
(Type an integer or a decimal.)
(d) at least 50 hours
(Type an integer or a decimal.)
Class
Limits
10-19
20-29
30-39
40-49
50-59
60-69
70-79
Total:
Frequency Relative
f
Frequency
12
0.300
5
5
11
4
2
1
n = 40
0.125
0.125
0.275
0.100
0.050
0.025
Transcribed Image Text:An empirical probability distribution based on weekly study times for a sample of 40 students is provided to the right. Suppose one of those students was chosen randomly. In parts (a) through (d) below, using your distribution, find the probability that the study time in the past week for the student selected would have been in each of the following ranges. (a) 30-39 hours (Type an integer or a decimal.) (b) 40-59 hours (Type an integer or a decimal.) (c) fewer than 30 hours (Type an integer or a decimal.) (d) at least 50 hours (Type an integer or a decimal.) Class Limits 10-19 20-29 30-39 40-49 50-59 60-69 70-79 Total: Frequency Relative f Frequency 12 0.300 5 5 11 4 2 1 n = 40 0.125 0.125 0.275 0.100 0.050 0.025
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