MATH 221 Statistics for Decision-Making Week 5 quiz with all correct answers. 100% COMPLETE SOLUTION.

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