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

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

1. Type II error = ?

A) None
B) Reject H# when true
C) Accept H# when false
D) Correct decision

2. The dot plot illustrates the frequency of outdoor games played by students per week.

Which statement is true?

A) The mean and median cannot be compared.
B) The mean is significantly bigger than the median.
C) The mean is almost the same as the median.
D) The mean is significantly smaller than the median.

3. A marketing analyst is studying the relationship between customer age groups, teens, adults, and seniors, and their preferred shopping methods, online and in-store.
Which numerical measure is most appropriate for this study?

A) Conditional percentages
B) Five-number summaries
C) Correlation coefficient
D) Mean difference

4. There are 14 black, 16 white, and 10 red balls in a box.
What is the probability of selecting 1 black ball, then 1 red ball, and then 1 white ball, replacing the ball each time?

A) 7/100
B) 7/200
C) 7/50
D) 21/200

5. A hospital analyzes the recovery rates of patients undergoing two different treatments for a specific condition.
Treatment X has an overall recovery rate of 80%, while Treatment Y has a recovery rate of 90%. However, when the data is divided by age groups, Treatment X has a higher recovery rate in each age group compared to Treatment Y.
Is Simpson's paradox present in this study?

A) Yes, because the recovery rates differ between the two treatments.
B) Yes, because the overall recovery rates are inconsistent with the age group-specific rates.
C) No, because the study does not involve a confounding variable that affects recovery rates.
D) No, because the overall recovery rate is higher for Treatment Y.

Solutions: