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

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

1. Probability of exactly 1 head in 2 coin flips = ?

A) 1/2
B) 3/4
C) 1/4
D) 1

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

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

3. Empirical probability is based on:

A) Theoretical models
B) Classical calculation
C) Subjective guess
D) Observed frequency of events

4. 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 decrease 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 increase in ice cream sales for every 1° increase in temperature.

5. Correlation coefficient r = #0.9 indicates:

A) Strong positive
B) No relationship
C) Weak negative
D) Strong negative linear relationship

Solutions: