WGU Applied-Probability-and-Statistics Exam : Applied Probability and Statistics (FZO1 C955)

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WGU Applied-Probability-and-Statistics Exam Syllabus Topics:

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

1. Variance formula = ?

A) x#²
B) #(x# # x#)² / (n # 1)
C) #x# / n
D) ##(x# # x#)²

2. A 10-sided die is rolled in a role-playing game.
What is the probability of rolling a number that is a multiple of 2 or greater than 7?

A) 4/5
B) 1/2
C) 7/10
D) 3/5

3. A cafe recorded the total ice cream sales and the average maximum temperature of the day. The scatterplot shows the recorded data. The regression equation y = 13x # 598 estimates the total ice cream sales, y, of a day and the average maximum temperature, x, on that day.

What does the slope represent in this context?

A) The slope represents the total ice cream sales on a day with a temperature of 100°.
B) The slope represents the average increase in ice cream sales for every 1° increase in temperature.
C) The slope represents the total ice cream sales on a day with a temperature of 0°.
D) The slope represents the average decrease in ice cream sales for every 1° increase in temperature.

4. In hypothesis testing, rejecting H# when true = ?

A) Correct decision
B) Null accepted
C) Type I error
D) Type II error

5. There are 20 men in a room whose heights are reflected in inches as 68, 70, 73, 67, 71, 68, 76, 70, 73, 66, 68,
69, 71, 74, 73, 72, 65, 60, 70, and 78 inches respectively.
What is the median of these data?

A) 73
B) 71
C) 70
D) 68

Solutions: