Question 1

Which of the following best describes a parameter in statistics?

Accepted Answer

A numerical measurement describing some characteristic of a population.

Question 2

A researcher wants to study the average height of all students at a university. She randomly selects 100 students and measures their heights. What is the sample in this scenario?

Accepted Answer

The 100 students selected and measured.

Question 3

Which level of measurement is characterized by data that can be arranged in order, but differences between data values are meaningless?

Accepted Answer

Ordinal

Question 4

A survey asks respondents to select their favorite color. What level of measurement does this data represent?

Accepted Answer

Nominal

Question 5

Which sampling technique involves selecting every $$kth $$individual from a list after a random starting point?

Accepted Answer

Systematic sampling

Question 6

A study reports that 45% of surveyed students prefer online classes. Is this value a parameter or a statistic?

Accepted Answer

Statistic

Question 7

Which of the following is an example of continuous data?

Accepted Answer

The height of a tree measured in meters.

Question 8

A researcher divides a city into districts and randomly selects several districts. All residents in the selected districts are surveyed. What sampling method is this?

Accepted Answer

Cluster sampling

Question 9

Which of the following is a common misuse of statistics?

Accepted Answer

Using a voluntary response sample.

Question 10

If a graph's axis does not start at zero, what is a potential issue that may arise?

Accepted Answer

It can exaggerate differences between data values.

Question 11

Convert 37% of 500 to a decimal and solve for the value.

Accepted Answer

$$0.37 	imes 500 = 185$$

Question 12

Which of the following best describes interval level of measurement?

Accepted Answer

Data can be ordered, and differences are meaningful, but there is no true zero.

Question 13

A researcher wants to study the effect of caffeine on reaction time. She randomly assigns participants to two groups: one receives caffeine, the other does not. What type of study is this?

Accepted Answer

Experimental study

Question 14

Which of the following is a ratio level variable?

Accepted Answer

Height in centimeters

Question 15

A sample is considered useless if:

Accepted Answer

It is not collected in an appropriate way.

Question 16

Which of the following is a potential source of bias in survey results?

Accepted Answer

Leading or ambiguous questions.

Question 17

If the volume of the 4th cube in a pictograph is 8 times the volume of the 1st cube, what is a potential issue with using such pictographs in statistics?

Accepted Answer

They can exaggerate differences and mislead interpretation.

Question 18

Which sampling method is most likely to produce a sample that is representative of the population?

Accepted Answer

Simple random sampling

Question 19

A survey reports that 97% of respondents support a new law, but the survey was conducted using a voluntary response sample. What is the main issue with this result?

Accepted Answer

The sample may not be representative of the population.

Question 20

Which of the following is the correct formula to convert a fraction $$\frac{5}{8} to a $$percentage?

Accepted Answer

$$\frac{5}{8} 	imes 100 = 62.5\%$$

Introduction to Data Collection and Sampling Techniques in Statistics

Study Guide - Practice Questions

Study Guide - Flashcards