LIBERTY UNIVERSITY
PSYC 354 - Statistics for the Behavioral Sciences
MODULE 4 QUIZ: QUESTIONS AND ANSWERS
Standard Deviation & Z-Scores | 2026 Update | Verified 100% Correct
Standard Deviation and Z-Score Fundamentals
Standardizing Distributions and Data Transformations
Comparing Scores Across Distributions
Behavioral Applications & 2026 Updates
30 Questions | Complete Answer Key | Grading Rubric
Aligned with PSYC 354 Curriculum & APA 7th Edition Standards
, PSYC 354 Module 4 Quiz | Liberty University | 2026 Update Verified 100% Correct
PART 1: EXAMINATION QUESTIONS
Section 1: Fundamentals of Z-Scores: Calculation and Interpretation
Q1: A population has a mean of μ = 50 and a standard deviation of σ = 10. What is the z-score for a
raw score of X = 65?
A. z = +0.50
B. z = +1.50
C. z = +1.00
D. z = +2.00
Q2: In a normal distribution with μ = 100 and σ = 15, a z-score of z = −2.00 corresponds to which
raw score?
A. X = 85
B. X = 130
C. X = 70
D. X = 115
Q3: Which of the following correctly describes the meaning of a z-score of z = 0?
A. The score is one standard deviation above the mean
B. The score is equal to the population mean
C. The score is at the median of a negatively skewed distribution
D. The score is exactly one standard deviation below the mean
Q4: A sample of reaction times has M = 400 ms and s = 50 ms. What is the z-score for a reaction time
of 325 ms?
A. z = −1.50
B. z = +1.50
C. z = −0.75
D. z = +0.75
Q5: For a population with μ = 80 and σ = 12, which raw score corresponds to z = +1.25?
A. X = 95
B. X = 104
C. X = 70
D. X = 86
Q6: A student scores X = 72 on a test with μ = 68 and σ = 4. Which statement is TRUE about this
score?
A. The score is 1 standard deviation below the mean
B. The score is 1 standard deviation above the mean
C. The score is exactly at the mean
D. The score is 2 standard deviations above the mean
Q7: What does a negative z-score indicate about the corresponding raw score?
Liberty University - PSYC 354 Statistics for the Behavioral Sciences Page 2
PSYC 354 - Statistics for the Behavioral Sciences
MODULE 4 QUIZ: QUESTIONS AND ANSWERS
Standard Deviation & Z-Scores | 2026 Update | Verified 100% Correct
Standard Deviation and Z-Score Fundamentals
Standardizing Distributions and Data Transformations
Comparing Scores Across Distributions
Behavioral Applications & 2026 Updates
30 Questions | Complete Answer Key | Grading Rubric
Aligned with PSYC 354 Curriculum & APA 7th Edition Standards
, PSYC 354 Module 4 Quiz | Liberty University | 2026 Update Verified 100% Correct
PART 1: EXAMINATION QUESTIONS
Section 1: Fundamentals of Z-Scores: Calculation and Interpretation
Q1: A population has a mean of μ = 50 and a standard deviation of σ = 10. What is the z-score for a
raw score of X = 65?
A. z = +0.50
B. z = +1.50
C. z = +1.00
D. z = +2.00
Q2: In a normal distribution with μ = 100 and σ = 15, a z-score of z = −2.00 corresponds to which
raw score?
A. X = 85
B. X = 130
C. X = 70
D. X = 115
Q3: Which of the following correctly describes the meaning of a z-score of z = 0?
A. The score is one standard deviation above the mean
B. The score is equal to the population mean
C. The score is at the median of a negatively skewed distribution
D. The score is exactly one standard deviation below the mean
Q4: A sample of reaction times has M = 400 ms and s = 50 ms. What is the z-score for a reaction time
of 325 ms?
A. z = −1.50
B. z = +1.50
C. z = −0.75
D. z = +0.75
Q5: For a population with μ = 80 and σ = 12, which raw score corresponds to z = +1.25?
A. X = 95
B. X = 104
C. X = 70
D. X = 86
Q6: A student scores X = 72 on a test with μ = 68 and σ = 4. Which statement is TRUE about this
score?
A. The score is 1 standard deviation below the mean
B. The score is 1 standard deviation above the mean
C. The score is exactly at the mean
D. The score is 2 standard deviations above the mean
Q7: What does a negative z-score indicate about the corresponding raw score?
Liberty University - PSYC 354 Statistics for the Behavioral Sciences Page 2
