Question 1

Which of the following best describes the term 'population' in statistics?

Accepted Answer

All the members of a group about which you want to draw a conclusion.

Question 2

A pharmaceutical company divides patients into two groups: one receives a new drug, the other receives a placebo. What is the group receiving the placebo called?

Accepted Answer

Control group

Question 3

Which of the following is an example of a continuous variable?

Accepted Answer

The temperature at which a hamburger is cooked

Question 4

In statistics, what is a 'frame'?

Accepted Answer

The list of all items in the population from which samples will be selected.

Question 5

Which sampling method ensures every individual in a population has the same chance of being selected?

Accepted Answer

Simple random sampling

Question 6

A summary measure computed to describe a characteristic of an entire population is called:

Accepted Answer

A parameter

Question 7

Which branch of statistics is used to draw conclusions about a population based on sample data?

Accepted Answer

Inferential statistics

Question 8

A survey asks, 'How many times in the past three months have you visited a museum?' The responses are values from which type of variable?

Accepted Answer

Discrete variable

Question 9

Which of the following is NOT a source of data in statistics?

Accepted Answer

Parameters

Question 10

A researcher selects entries from a fishbowl and returns each entry after it is drawn. What sampling method is this?

Accepted Answer

Sampling with replacement

Question 11

Which of the following best describes a categorical variable?

Accepted Answer

A variable whose values are selected from an established list of categories

Question 12

In a double-blind experiment, who knows the identities of the treatment and control groups?

Accepted Answer

Neither the researcher nor the participants

Question 13

Which sampling method is generally considered to produce more desirable samples?

Accepted Answer

Sampling without replacement

Question 14

A company wants to study employee preferences for a dental benefits package. They select 100 employees from a list of all 5,000 workers. What is the population?

Accepted Answer

All 5,000 employees

Question 15

Which of the following is an example of a real-world application of descriptive statistics?

Accepted Answer

Calculating the average age of citizens who voted for the winning candidate in an election

Question 16

If a sample is not representative of the population due to an incomplete frame, what is likely to occur?

Accepted Answer

The results will be inaccurate

Question 17

Which of the following is a plausible reason to use nonprobability sampling?

Accepted Answer

To obtain rough approximations of results at low cost

Question 18

A variable is sometimes known as a column of data because:

Accepted Answer

Each observation is entered as a unique row in a table of data

Question 19

Which of the following best describes the process of sampling?

Accepted Answer

The process by which members of a population are selected for a sample

Question 20

A study finds that raising the price of a book by 1% reduces sales by 4% at BN.com but only 0.5% at Amazon.com. This is an example of:

Accepted Answer

Using statistics to interpret real-world data for decision-making

Fundamentals of Statistics: Key Concepts and Methods

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