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

1. Rare event count per interval modeled by:

A) Binomial
B) Poisson
C) Uniform
D) Normal

2. A road safety research group wants to enhance road safety by analyzing the stopping distance of a car at different speeds. The group has recorded their data in the following scatterplot.

What is true about the outlier in the scatterplot?

A) The stopping distance of a car traveling at 40 mph is 560 feet.
B) The stopping distance of a car traveling at 30 mph is 190 feet.
C) The stopping distance of a car traveling at 60 mph is 500 feet.
D) The stopping distance of a car traveling at 10 mph is 20 feet.

3. Type II error occurs when:

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

4. A city council surveys residents and business owners about a proposed new public transportation system. The results of the survey are shown in the following 2 × 2 contingency table.

Which statement is true?

A) A resident is much more likely than a business owner to favor the new transportation system.
B) A resident is slightly more likely than a business owner to favor the new transportation system.
C) A resident is slightly less likely than a business owner to favor the new transportation system.
D) A resident is much less likely than a business owner to favor the new transportation system.

5. Chi-square test used for:

A) Means of two samples
B) Regression
C) Association of categorical variables
D) Variance

Solutions: