,MATH 1280 Final Exam (Proctored) – Questions and Answers | 2026 Updated | 100% Correct -
University of the People.
Section 1: Multiple Choice (1–100)
1. What is the median of [12, 15, 14, 10, 18]?
A) 12
B) 14
C) 15
D) 13.8
✅ B) 14 — Sorted: 10,12,14,15,18 → middle = 14.
2. If variance = 49, standard deviation = ?
A) 7
B) 9
C) 14
D) 2401
✅ A) 7
3. Which is not a probability sampling method?
A) Simple random
B) Stratified
C) Convenience
D) Cluster
,✅ C) Convenience
4. P(A) = 0.5, P(B) = 0.4, P(A∩B) = 0.2. Find P(A|B).
A) 0.5
B) 0.4
C) 0.2
D) 0.8
✅ A) 0.5 — 0.2/0.4 = 0.5.
5. In a boxplot, the box represents:
A) Min to max
B) Q1 to Q3
C) Mean ± SD
D) Median ± IQR
✅ B) Q1 to Q3
6. A fair die rolled once. Probability of odd number?
A) 1/6
B) 1/3
C) 1/2
D) 2/3
, ✅ C) 1/2
7. Which is a continuous random variable?
A) Number of students
B) Height
C) Shoe size
D) Coin flips
✅ B) Height
8. Z-score of data point 70, mean 60, SD 5?
A) 1
B) 2
C) 0.5
D) -2
✅ B) 2
9. 68-95-99.7 rule applies to:
A) Binomial
B) Uniform
C) Normal
D) Exponential
University of the People.
Section 1: Multiple Choice (1–100)
1. What is the median of [12, 15, 14, 10, 18]?
A) 12
B) 14
C) 15
D) 13.8
✅ B) 14 — Sorted: 10,12,14,15,18 → middle = 14.
2. If variance = 49, standard deviation = ?
A) 7
B) 9
C) 14
D) 2401
✅ A) 7
3. Which is not a probability sampling method?
A) Simple random
B) Stratified
C) Convenience
D) Cluster
,✅ C) Convenience
4. P(A) = 0.5, P(B) = 0.4, P(A∩B) = 0.2. Find P(A|B).
A) 0.5
B) 0.4
C) 0.2
D) 0.8
✅ A) 0.5 — 0.2/0.4 = 0.5.
5. In a boxplot, the box represents:
A) Min to max
B) Q1 to Q3
C) Mean ± SD
D) Median ± IQR
✅ B) Q1 to Q3
6. A fair die rolled once. Probability of odd number?
A) 1/6
B) 1/3
C) 1/2
D) 2/3
, ✅ C) 1/2
7. Which is a continuous random variable?
A) Number of students
B) Height
C) Shoe size
D) Coin flips
✅ B) Height
8. Z-score of data point 70, mean 60, SD 5?
A) 1
B) 2
C) 0.5
D) -2
✅ B) 2
9. 68-95-99.7 rule applies to:
A) Binomial
B) Uniform
C) Normal
D) Exponential
