Psychology Statistics Exam Bank 2026–
2027 Official Academic Board of
Psychology – Verified Questions &
Answers for Undergraduate Psychology
Students
SECTION 1: INTRODUCTION TO STATISTICS IN
PSYCHOLOGY
Question 1
Which of the following best describes the primary purpose of statistics in psychological
research?
A) To prove that a researcher's hypothesis is correct
B) To organize, summarize, and interpret data to draw meaningful conclusions
C) To replace clinical judgment with mathematical formulas
D) To ensure that all research participants provide identical responses
Answer: B
Rationale: Statistics serve to organize, summarize, and interpret data, allowing
researchers to draw meaningful conclusions from their observations. Statistics do not
,"prove" hypotheses (A); they provide evidence. They complement rather than replace
clinical judgment (C), and they cannot ensure identical participant responses (D).
Question 2
The entire group of individuals that a researcher is interested in studying is called the:
A) Sample
B) Statistic
C) Population
D) Parameter
Answer: C
Rationale: The population refers to the entire group of individuals of interest in a
particular study. A sample (A) is a subset drawn from the population. A statistic (B) is a
numerical value describing a sample, and a parameter (D) describes a population.
Question 3
A subset of observations taken from the larger group of interest is known as a:
A) Population
B) Parameter
C) Sample
D) Variable
Answer: C
,Rationale: A sample is a subset of observations from the population of interest,
intended to represent the population as a whole. The population (A) is the entire group.
A parameter (B) describes a population, and a variable (D) is any characteristic that can
vary.
Question 4
Statistical techniques that summarize, organize, and simplify data are classified as:
A) Population statistics
B) Sample statistics
C) Descriptive statistics
D) Inferential statistics
Answer: C
Rationale: Descriptive statistics are procedures used to summarize, organize, and
simplify data. Inferential statistics (D) allow researchers to draw conclusions about
populations based on sample data. Population statistics (A) and sample statistics (B) are
not standard classifications of statistical techniques.
Question 5
Which type of statistics allows researchers to draw conclusions about populations based
on sample data?
A) Descriptive statistics
B) Inferential statistics
, C) Qualitative statistics
D) Experimental statistics
Answer: B
Rationale: Inferential statistics involve techniques that allow researchers to study
samples and then make generalizations about the populations from which they were
selected. Descriptive statistics (A) only summarize data. Qualitative statistics (C) and
experimental statistics (D) are not standard categories.
Question 6
A numerical value that describes a characteristic of a population is called a:
A) Statistic
B) Parameter
C) Sample
D) Variable
Answer: B
Rationale: A parameter is a numerical value that characterizes a population. A statistic
(A) describes a sample. A sample (C) is a subset of the population, and a variable (D) is a
characteristic that can take different values.
Question 7
A numerical value that describes a characteristic of a sample is called a:
2027 Official Academic Board of
Psychology – Verified Questions &
Answers for Undergraduate Psychology
Students
SECTION 1: INTRODUCTION TO STATISTICS IN
PSYCHOLOGY
Question 1
Which of the following best describes the primary purpose of statistics in psychological
research?
A) To prove that a researcher's hypothesis is correct
B) To organize, summarize, and interpret data to draw meaningful conclusions
C) To replace clinical judgment with mathematical formulas
D) To ensure that all research participants provide identical responses
Answer: B
Rationale: Statistics serve to organize, summarize, and interpret data, allowing
researchers to draw meaningful conclusions from their observations. Statistics do not
,"prove" hypotheses (A); they provide evidence. They complement rather than replace
clinical judgment (C), and they cannot ensure identical participant responses (D).
Question 2
The entire group of individuals that a researcher is interested in studying is called the:
A) Sample
B) Statistic
C) Population
D) Parameter
Answer: C
Rationale: The population refers to the entire group of individuals of interest in a
particular study. A sample (A) is a subset drawn from the population. A statistic (B) is a
numerical value describing a sample, and a parameter (D) describes a population.
Question 3
A subset of observations taken from the larger group of interest is known as a:
A) Population
B) Parameter
C) Sample
D) Variable
Answer: C
,Rationale: A sample is a subset of observations from the population of interest,
intended to represent the population as a whole. The population (A) is the entire group.
A parameter (B) describes a population, and a variable (D) is any characteristic that can
vary.
Question 4
Statistical techniques that summarize, organize, and simplify data are classified as:
A) Population statistics
B) Sample statistics
C) Descriptive statistics
D) Inferential statistics
Answer: C
Rationale: Descriptive statistics are procedures used to summarize, organize, and
simplify data. Inferential statistics (D) allow researchers to draw conclusions about
populations based on sample data. Population statistics (A) and sample statistics (B) are
not standard classifications of statistical techniques.
Question 5
Which type of statistics allows researchers to draw conclusions about populations based
on sample data?
A) Descriptive statistics
B) Inferential statistics
, C) Qualitative statistics
D) Experimental statistics
Answer: B
Rationale: Inferential statistics involve techniques that allow researchers to study
samples and then make generalizations about the populations from which they were
selected. Descriptive statistics (A) only summarize data. Qualitative statistics (C) and
experimental statistics (D) are not standard categories.
Question 6
A numerical value that describes a characteristic of a population is called a:
A) Statistic
B) Parameter
C) Sample
D) Variable
Answer: B
Rationale: A parameter is a numerical value that characterizes a population. A statistic
(A) describes a sample. A sample (C) is a subset of the population, and a variable (D) is a
characteristic that can take different values.
Question 7
A numerical value that describes a characteristic of a sample is called a:
