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.
Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter12: Probability
Section12.4: Discrete Random Variables; Applications To Decision Making
Problem 4E
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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.
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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