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

1. 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

2. Probability sum for all outcomes = ?

A) 0
B) < 1
C) > 1
D) 1

3. Standard error decreases when:

A) Mean increases
B) Sample size decreases
C) SD increases
D) Sample size increases

4. Histogram is best for:

A) Scatterplots
B) Categorical data
C) Continuous numerical data frequency
D) Boxplots

5. Z-score formula = ?

A) x/ #
B) (x # # )/ #
C) # / #
D) (x + # )/ #

Solutions: