Spring Semester February 2026 WGU C955 Applied Probability & Statistics Objective Assessment (OA) Exam Prep | Probability Rules, Descriptive Statistics, Inferential Analysis, Hypothesis Testing, Regression, Correlation, Data Interpretation, Sampling Techn

Spring Semester February 2026 WGU C955 Applied
Probability & Statistics Objective Assessment (OA)
Exam Prep | Probability Rules, Descriptive
Statistics, Inferential Analysis, Hypothesis Testing,
Regression, Correlation, Data Interpretation,
Sampling Techniques & Statistical Decision-Making
Study Guide with Practice Questions

, Question 1:
What is the probability of rolling a sum of 7 with two six-sided dice?
1
• A) 6
1
• B) 12
5
• C) 36
1
• D) 8
1
Correct Answer: D) 8

Rationale: When rolling two six-sided dice, there are 36 possible outcomes. The pairs
that total 7 are (1,6), (2,5), (3,4), (4,3), (5,2), and (6,1) — a total of 6 outcomes. Therefore,
6 1
the probability is 36 = 6.



Question 2:
If a standard deck of cards has 52 cards, what is the probability of drawing a heart
or a diamond?
1
• A) 2
1
• B) 4
1
• C) 3
1
• D) 13
1
Correct Answer: B) 4

Rationale: There are 13 hearts and 13 diamonds in a deck of 52 cards. The total number
of favorable outcomes is 26 (13 hearts + 13 diamonds). The probability is calculated as
26 1
= 2.
52




Question 3:
In a normal distribution, approximately what percentage of data falls within one
standard deviation from the mean?
• A) 50%
• B) 68%