Question 1

Which of the following best describes the process involved in conducting a statistical study?

Accepted Answer

Prepare, analyze, and conclude.

Question 2

A researcher wants to study the heights of all students at a university. What is the population in this scenario?

Accepted Answer

All students at the university.

Question 3

Which of the following is an example of a voluntary response sample?

Accepted Answer

A poll where people call in to share their opinions.

Question 4

Why is a voluntary response sample generally considered flawed?

Accepted Answer

It is likely to be biased because respondents self-select.

Question 5

In a study, 98 girls are born out of 100 random births. Why is this result considered statistically significant?

Accepted Answer

Because such an extreme outcome is unlikely to result from random chance.

Question 6

Which of the following best defines 'statistics'?

Accepted Answer

The science of planning studies and experiments; obtaining data; and organizing, summarizing, presenting, analyzing, and interpreting those data and then drawing conclusions based on them.

Question 7

A survey asks people to report their own weight. What potential pitfall does this method introduce?

Accepted Answer

Sample data reported instead of measured.

Question 8

Which of the following is an example of practical significance but not statistical significance?

Accepted Answer

A diet program results in an average weight loss of 2.1 kg, which is statistically significant but not considered worthwhile by most participants.

Question 9

What is the main objective when using a sample in statistics?

Accepted Answer

To draw conclusions about the population.

Question 10

Which of the following is NOT a recommended step in the 'prepare' phase of a statistical study?

Accepted Answer

Ignore the sampling method.

Question 11

A survey is conducted with a very low response rate. What is the most likely consequence?

Accepted Answer

There is an increased likelihood of bias among those who do respond.

Question 12

Which of the following is a collection of observations, such as measurements, genders, or survey responses?

Accepted Answer

Data

Question 13

If a survey question is worded in a way that influences the respondent's answer, what is this called?

Accepted Answer

Loaded question

Question 14

Which of the following is true about percentages in statistical studies?

Accepted Answer

Percentages exceeding 100% are often not justified.

Question 15

A study finds a statistically significant result with $$p = 0.03. $$What does this mean?

Accepted Answer

The likelihood of the result occurring by chance is 3%.

Question 16

Which of the following best describes a census?

Accepted Answer

The collection of data from every member of a population.

Question 17

In the context of statistical analysis, what is the difference between statistical significance and practical significance?

Accepted Answer

Statistical significance is about the probability of the result occurring by chance, while practical significance is about whether the result is meaningful in real life.

Question 18

Which of the following is a potential pitfall when analyzing data?

Accepted Answer

Reporting sample data instead of measuring.

Question 19

A study uses a random sample of 500 people to estimate the opinion of all residents in a city. What is the sample?

Accepted Answer

The 500 people who were randomly selected.

Question 20

Which of the following is NOT a step in the 'analyze' phase of a statistical study?

Accepted Answer

Draw conclusions about practical significance.

Chapter 1: Introduction to Statistics – Key Concepts and Critical Thinking

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