$$\lfloor 0.65 \times 281 \rfloor = 182$$

Question 1

Which of the following best describes the GOAL of statistics?

Accepted Answer

To learn about a population by examining data from a sample group.

Question 2

In the context of a survey of 1000 gasoline stations to determine the average price per gallon, what is the population?

Accepted Answer

All gasoline stations in the United States.

Question 3

Which of the following is the correct definition of statistics?

Accepted Answer

The science of collecting, organizing, analyzing, and interpreting data in order to draw conclusions based on the data.

Question 4

A survey asks 281 people about their book preferences. 65% prefer printed books. How many respondents is this?

Accepted Answer

$$\lfloor 0.65 	imes 281 floor = 182$$

Question 5

Which sampling method is illustrated by selecting every 3rd individual from a population?

Accepted Answer

Systematic sampling

Question 6

Which of the following is a potential source of bias in a statistical study?

Accepted Answer

Allowing respondents to decide whether to participate (voluntary response sample).

Question 7

Which level of measurement is appropriate for body temperatures measured in degrees Fahrenheit?

Accepted Answer

Interval

Question 8

A researcher randomly selects two entire classrooms from a school and surveys all students in those rooms. What sampling method is this?

Accepted Answer

Cluster sampling

Question 9

Which of the following is an example of categorical (qualitative) data?

Accepted Answer

The types of movies (drama, comedy, adventure, documentary).

Question 10

Which principle is violated when a survey question is worded to elicit a desired response?

Accepted Answer

Loaded question

Question 11

Which of the following is a discrete data set?

Accepted Answer

The number of representatives present at each session.

Question 12

Which of the following is a parameter?

Accepted Answer

The mean atomic weight of all elements in the periodic table.

Question 13

Which level of measurement allows for meaningful ratios and has a true zero?

Accepted Answer

Ratio

Question 14

A study collects data from subjects at one point in time. What type of observational study is this?

Accepted Answer

Cross-sectional

Question 15

Which of the following is an example of practical significance?

Accepted Answer

A result that leads to a meaningful and useful conclusion in real life.

Question 16

Which sampling method is illustrated by dividing a population into groups based on gender and then randomly selecting members from each group?

Accepted Answer

Stratified sampling

Question 17

A survey reports that a dental rinse reduces plaque by over 300%. What is wrong with this statement?

Accepted Answer

The statement is misleading because it is unclear what 'over 300%' means in this context.

Question 18

Which of the following is NOT a key step in the process of a statistical study?

Accepted Answer

Ignore the source of data

Question 19

Which of the following is a common way data can be distorted in statistical studies?

Accepted Answer

Reporting sample data instead of measured data.

Question 20

Which of the following is a correct conversion from a decimal to a percentage?

Accepted Answer

$$0.75 = 75\%$$

Chapter 1: Introduction to Statistics – Structured Study Notes

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