WGU C955 Applied Probability
and Statistics Final Exam
2026/2027 – Verified Q&As
with Detailed Rationales (Test
Bank Bundle - 46 Questions)
---
*QUESTION 1:*
A company is analyzing the ages of its employees. The ages are 25, 30, 35, 40, and 45. What is the mean
age?
A) 35
B) 30
C) 40
D) 25
> 🎯 *CORRECT ANSWER:* A) 35
> 💡 *CLINICAL RATIONALE:*
> * *Why It's Right:* Mean = (25+30+35+40+45)/5 = 175/5 = 35.
> * *Why Distractors Fail:* Other values are incorrect calculations.
> * *Core Takeaway:* The mean is the average.
,---
*QUESTION 2:*
Using the same data set (25, 30, 35, 40, 45), what is the median?
A) 35
B) 30
C) 40
D) 25
> 🎯 *CORRECT ANSWER:* A) 35
> 💡 *CLINICAL RATIONALE:*
> * *Why It's Right:* The median is the middle value when sorted.
> * *Why Distractors Fail:* Other values are not the middle.
> * *Core Takeaway:* The median is the middle value.
---
*QUESTION 3:*
What is the mode of the data set: 2, 3, 3, 4, 5, 5, 5, 6?
A) 5
B) 3
C) 4
D) 6
> 🎯 *CORRECT ANSWER:* A) 5
> 💡 *CLINICAL RATIONALE:*
> * *Why It's Right:* The mode is the most frequent value.
> * *Why Distractors Fail:* 3 appears twice; 5 appears three times.
,> * *Core Takeaway:* The mode is the most frequent value.
---
*QUESTION 4:*
A data set has a mean of 50 and a standard deviation of 5. What is the z-score for a value of 60?
A) 2
B) 1
C) -2
D) 0
> 🎯 *CORRECT ANSWER:* A) 2
> 💡 *CLINICAL RATIONALE:*
> * *Why It's Right:* z = (60 - 50) / 5 = = 2.
> * *Why Distractors Fail:* Other values are incorrect.
> * *Core Takeaway:* z-score = (x - μ) / σ.
---
*QUESTION 5:*
A probability of 0 means:
A) The event is impossible
B) The event is certain
C) The event is likely
D) The event is unlikely
> 🎯 *CORRECT ANSWER:* A) The event is impossible
> 💡 *CLINICAL RATIONALE:*
> * *Why It's Right:* A probability of 0 indicates impossibility.
, > * *Why Distractors Fail:* 1 is certain; 0.5 is likely; 0.25 is unlikely.
> * *Core Takeaway:* Probability 0 = impossible.
---
*QUESTION 6:*
A probability of 1 means:
A) The event is certain
B) The event is impossible
C) The event is likely
D) The event is unlikely
> 🎯 *CORRECT ANSWER:* A) The event is certain
> 💡 *CLINICAL RATIONALE:*
> * *Why It's Right:* A probability of 1 indicates certainty.
> * *Why Distractors Fail:* 0 is impossible; 0.5 is likely; 0.25 is unlikely.
> * *Core Takeaway:* Probability 1 = certain.
---
*QUESTION 7:*
A company finds that 60% of customers are satisfied. If a customer is randomly selected, what is the
probability they are satisfied?
A) 0.6
B) 0.4
C) 0.5
D) 1.0
> 🎯 *CORRECT ANSWER:* A) 0.6
> 💡 *CLINICAL RATIONALE:*
and Statistics Final Exam
2026/2027 – Verified Q&As
with Detailed Rationales (Test
Bank Bundle - 46 Questions)
---
*QUESTION 1:*
A company is analyzing the ages of its employees. The ages are 25, 30, 35, 40, and 45. What is the mean
age?
A) 35
B) 30
C) 40
D) 25
> 🎯 *CORRECT ANSWER:* A) 35
> 💡 *CLINICAL RATIONALE:*
> * *Why It's Right:* Mean = (25+30+35+40+45)/5 = 175/5 = 35.
> * *Why Distractors Fail:* Other values are incorrect calculations.
> * *Core Takeaway:* The mean is the average.
,---
*QUESTION 2:*
Using the same data set (25, 30, 35, 40, 45), what is the median?
A) 35
B) 30
C) 40
D) 25
> 🎯 *CORRECT ANSWER:* A) 35
> 💡 *CLINICAL RATIONALE:*
> * *Why It's Right:* The median is the middle value when sorted.
> * *Why Distractors Fail:* Other values are not the middle.
> * *Core Takeaway:* The median is the middle value.
---
*QUESTION 3:*
What is the mode of the data set: 2, 3, 3, 4, 5, 5, 5, 6?
A) 5
B) 3
C) 4
D) 6
> 🎯 *CORRECT ANSWER:* A) 5
> 💡 *CLINICAL RATIONALE:*
> * *Why It's Right:* The mode is the most frequent value.
> * *Why Distractors Fail:* 3 appears twice; 5 appears three times.
,> * *Core Takeaway:* The mode is the most frequent value.
---
*QUESTION 4:*
A data set has a mean of 50 and a standard deviation of 5. What is the z-score for a value of 60?
A) 2
B) 1
C) -2
D) 0
> 🎯 *CORRECT ANSWER:* A) 2
> 💡 *CLINICAL RATIONALE:*
> * *Why It's Right:* z = (60 - 50) / 5 = = 2.
> * *Why Distractors Fail:* Other values are incorrect.
> * *Core Takeaway:* z-score = (x - μ) / σ.
---
*QUESTION 5:*
A probability of 0 means:
A) The event is impossible
B) The event is certain
C) The event is likely
D) The event is unlikely
> 🎯 *CORRECT ANSWER:* A) The event is impossible
> 💡 *CLINICAL RATIONALE:*
> * *Why It's Right:* A probability of 0 indicates impossibility.
, > * *Why Distractors Fail:* 1 is certain; 0.5 is likely; 0.25 is unlikely.
> * *Core Takeaway:* Probability 0 = impossible.
---
*QUESTION 6:*
A probability of 1 means:
A) The event is certain
B) The event is impossible
C) The event is likely
D) The event is unlikely
> 🎯 *CORRECT ANSWER:* A) The event is certain
> 💡 *CLINICAL RATIONALE:*
> * *Why It's Right:* A probability of 1 indicates certainty.
> * *Why Distractors Fail:* 0 is impossible; 0.5 is likely; 0.25 is unlikely.
> * *Core Takeaway:* Probability 1 = certain.
---
*QUESTION 7:*
A company finds that 60% of customers are satisfied. If a customer is randomly selected, what is the
probability they are satisfied?
A) 0.6
B) 0.4
C) 0.5
D) 1.0
> 🎯 *CORRECT ANSWER:* A) 0.6
> 💡 *CLINICAL RATIONALE:*
