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WGU Applied Probability and Statistics (FZO1 C955) Sample Questions:

1. Probability of rolling an odd number on a die:

A) 2/3
B) 1/3
C) 1/2
D) 1/6

2. Mean = 50, SD = 5, n = 25. Standard error = ?

A) 25
B) 0.2
C) 1
D) 5

3. Type II error occurs when:

A) Null accepted when false
B) Null rejected when true
C) Data error
D) Correct decision

4. There are 12 cell phone charging cords available at a store for purchase. The length of each charging cord in inches is reflected as 3, 3, 4, 6, 6, 6, 6, 7, 10, 10, 11, and 12, respectively.
What are the mean of these data?

A) 9
B) 8
C) 6
D) 7

5. A dataset: 2, 4, 6, 8, 10. Variance = ?

A) 10
B) 6.25
C) 8
D) 5

Solutions: