Statistical Analysis Quizzes for Social Work Students

Question 1

Which measure of central tendency represents the most frequent value in a dataset?

Accepted Answer

Mode

Answer

Mean

Answer

Median

Answer

Range

Question 2

In hypothesis testing, the null hypothesis assumes:

Accepted Answer

There is no significant difference between the groups.

Answer

There is a significant difference between the groups.

Answer

The alternative hypothesis is true.

Answer

The sample is representative of the population.

Question 3

When interpreting a scatterplot, a positive correlation indicates:

Accepted Answer

As one variable increases, the other variable also increases.

Answer

As one variable increases, the other variable decreases.

Answer

There is no relationship between the variables.

Answer

The variables are inversely proportional.

Question 4

What is the purpose of a significance level in hypothesis testing?

Accepted Answer

To set the threshold for rejecting the null hypothesis.

Answer

To determine the probability of rejecting the null hypothesis when it is true.

Answer

To determine the probability of accepting the null hypothesis when it is false.

Answer

To ensure that the results of the study are reliable.

Question 5

What is the relationship between a population and a sample?

Accepted Answer

A population is the entire group of interest, while a sample is a subset used to make inferences about the population.

Answer

A population is always larger than a sample.

Answer

A sample is always representative of the population.

Answer

A sample is used to calculate statistics, while a population is used to make generalizations.

Question 6

What is the primary purpose of the chi-square test in research?

Accepted Answer

To examine the relationship between two categorical variables

Answer

To compare two continuous variables

Answer

To calculate the probability of an event

Answer

To predict the outcome of a future event

Question 7

What is the purpose of a confidence interval?

Accepted Answer

To estimate the true value of a population parameter with a specified level of certainty

Answer

To determine if there is a statistically significant difference between two groups

Answer

To predict future outcomes based on past data

Answer

To identify outliers in a dataset

Question 8

What is the difference between a population and a sample?

Accepted Answer

A population is the entire group of interest, while a sample is a smaller group that represents the population

Answer

A sample is the entire group of interest, while a population is a smaller group that represents the sample

Answer

There is no difference between a population and a sample

Answer

A population is only used in quantitative research, while a sample is used in qualitative research

Question 9

What is the purpose of a data analysis plan?

Accepted Answer

To outline the methods that will be used to analyze the data and ensure a transparent and reproducible analysis process

Answer

To ensure that the data is collected in a valid and reliable manner

Answer

To present the results of the data analysis

Answer

To determine the sample size for the study

Question 10

Which ethical principle requires researchers to protect the privacy of participants?

Accepted Answer

Confidentiality

Answer

Informed consent

Answer

Anonymity

Answer

Beneficence

Question 11

Which of the following is not considered a descriptive statistic?

Accepted Answer

Hypothesis test

Answer

Mean

Answer

Median

Answer

Standard deviation

Question 12

What is the primary purpose of hypothesis testing?

Accepted Answer

To determine whether there is a statistically significant relationship between variables

Answer

To describe the characteristics of a dataset

Answer

To predict future events

Answer

To manipulate variables in an experiment

Question 13

How does a sample differ from a population in the context of statistical analysis?

Accepted Answer

A sample is a subset of the population being studied

Answer

A population is a subset of the sample

Answer

They represent the same group of individuals

Answer

A population is a theoretical concept, while a sample is a real-world set of data

Question 14

Which of the following is a measure of the typical value in a dataset?

Accepted Answer

Mean

Answer

Standard deviation

Answer

Variance

Answer

Correlation coefficient

Question 15

What is the null hypothesis in statistical testing?

Accepted Answer

The hypothesis that there is no significant difference or relationship between variables

Answer

The hypothesis that there is a significant difference or relationship between variables

Answer

The hypothesis that the data is random

Answer

The hypothesis that the data is biased

Question 16

What is the difference between correlation and causation in statistics?

Accepted Answer

Correlation measures the strength and direction of a relationship, while causation implies one variable causes a change in another

Answer

Causation measures the strength and direction of a relationship, while correlation implies one variable causes a change in another

Answer

They are the same concept

Answer

Correlation measures the strength of a relationship, while causation measures the direction of a relationship

Question 17

What is the main purpose of using a confidence interval in statistical analysis?

Accepted Answer

To estimate a range of values likely to contain the true population parameter

Answer

To determine the statistical significance of a relationship

Answer

To predict future events

Answer

To manipulate variables in an experiment

Question 18

How does sample size affect the accuracy of research findings?

Accepted Answer

A larger sample size leads to more accurate findings.

Answer

A smaller sample size leads to more accurate findings.

Answer

A larger sample size leads to less accurate findings.

Answer

The sample size has no influence on the accuracy of the findings.

Question 19

Which of the following is NOT a measure of central tendency?

Accepted Answer

Standard deviation

Answer

Mode

Answer

Mean

Answer

Median

Question 20

What is the main purpose of hypothesis testing in statistical analysis?

Accepted Answer

To make inferences about a population from sample data

Answer

To prove a hypothesis as true

Answer

To describe the features of a sample

Answer

To predict future events

Question 21

Which of the following is NOT a measure of central tendency?

Accepted Answer

Range

Answer

Mean

Answer

Median

Question 22

A hypothesis test is conducted with a significance level of 0.05. If the p-value is 0.04, what is the conclusion at the 5% level of significance?

Accepted Answer

Reject the null hypothesis

Answer

Fail to reject the null hypothesis

Answer

Partially reject the null hypothesis

Question 23

A correlation coefficient of -0.7 indicates:

Accepted Answer

A strong negative relationship

Answer

No relationship

Answer

A moderate positive relationship

Answer

A weak positive relationship

Question 24

Which of the following is a technique for data visualization?

Accepted Answer

Scatterplot

Answer

Hypothesis testing

Answer

T-test

Answer

Regression analysis

Question 25

A sample size of 100 is generally considered to be:

Accepted Answer

Adequate for most statistical tests

Answer

Too small for meaningful analysis

Answer

Only suitable for non-parametric tests

Answer

Too large to be manageable

Question 26

What is the purpose of a confidence interval?

Accepted Answer

To estimate the range of values within which the true population parameter falls with a specific level of confidence

Answer

To test the null hypothesis

Answer

To determine the level of statistical significance

Question 27

Which of the following is a limitation of statistical analysis?

Accepted Answer

It cannot account for all sources of variation

Answer

It is always precise and accurate

Answer

It is a substitute for qualitative research

Answer

It requires a large sample size to be effective