PSYC 3002 (Intro to Basic Statistics) Finals Exam Review (Qns & Ans) 2025.

PSYC 3002

Introduction to Basic Statistics

Finals Exam Review (Qns & Ans)

2025




1. What is the primary purpose of descriptive statistics?
- A) To infer characteristics of a population based on sample
data
- B) To organize and summarize data
- C) To predict future trends
- D) To test a hypothesis
Correct ANS: B


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, Rationale: Descriptive statistics aim to summarize and
organize data to present a clear picture of the given dataset.


2. In which situation would you use the median instead of the
mean?
- A) When data is normally distributed
- B) When data contains outliers
- C) When the sample size is large
- D) When dealing with categorical data
Correct ANS: B
Rationale: The median is a better measure of central tendency
than the mean when dealing with skewed distributions or outliers.


3. What type of chart is best to display the frequency distribution
of categorical data?
- A) Box plot
- B) Histogram
- C) Bar chart
- D) Scatter plot
Correct ANS: C
Rationale: A bar chart is specifically designed for displaying
categorical data.
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, 4. The standard deviation measures:
- A) The average of a data set
- B) The middle value of a data set
- C) The variability or spread of scores within a dataset
- D) The strength of a relationship between variables
Correct ANS: C
Rationale: Standard deviation quantifies the amount of
variation or dispersion in a set of values.


5. What is the primary objective of inferential statistics?
- A) To calculate averages
- B) To summarize data
- C) To make predictions or generalizations about a population
based on sample data
- D) To visualize data
Correct ANS: C
Rationale: Inferential statistics allows researchers to draw
conclusions about a population based on a representative sample.


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