math 221 statistics for decision making week 5 quiz with all correct answers 100 complete solution
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Question 1
pts
(CO 4) Consider the following table:
Age Group Frequency
18-29 983
30-39 784
40-49 686
50-59 632
60-69 541
70 and over 527
If you created the probability distribution for these data, what would be the probability of 40-49?
0.237
0.425
0.189
Correct!
0.165
Question 2
pts
(CO 4) Consider the following table of hours worked by part-time employees. These employees must
work in 5 hour blocks.
Weekly hours worked Probability
5 0.06
15 0.61
20 0.18
25 0.15
, Find the mean of this variable.
18.95
12.20
17.50
Correct!
16.80
Question 3
pts
(CO 4) Consider the following table:
Defects in batchProbability
0 0.21
1 0.19
2 0.30
3 0.15
4 0.11
5 0.04
Find the variance of this variable.
1.49
1.40
Correct!
1.97
1.88
Question 4
pts
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