Question 1

Which of the following best describes a quantitative variable?

Accepted Answer

A variable that represents numerical values with measurement units or counts.

Question 2

In a study examining the effects of a new medication, the people who are given the medication and observed for changes are called:

Accepted Answer

Subjects/Participants

Question 3

A company uses customer ID numbers to track purchases. These ID numbers are an example of:

Accepted Answer

Identifier Variables

Question 4

Which of the following is an example of an ordinal variable?

Accepted Answer

Survey responses: 'Strongly disagree', 'Disagree', 'Neutral', 'Agree', 'Strongly agree'

Question 5

Why is context considered vital in statistics?

Accepted Answer

It helps us organize values into a data table and gives meaning to the data.

Question 6

A researcher wants to study the effect of texting while driving on accident rates. Which step should they take first according to effective data collection?

Accepted Answer

Determine what they want to figure out with their analysis (the why).

Question 7

Which of the following best defines statistics?

Accepted Answer

The science of collecting, organizing, and interpreting data to find underlying truths behind variation.

Question 8

A survey asks participants to select their favorite color. The variable 'favorite color' is:

Accepted Answer

Categorical

Question 9

Which scenario demonstrates why the collection method can drastically impact results?

Accepted Answer

Collecting data from an internet poll where responses are not filtered.

Question 10

In a dataset about hospital patients, the rows represent individual patients and the columns represent variables such as age, diagnosis, and treatment. What do the rows and columns represent?

Accepted Answer

Rows: who; Columns: what

Question 11

A variable records the number of times a student attends class in a semester. This variable is:

Accepted Answer

Quantitative

Question 12

Which of the following is NOT a reason why statistics is vital in solving real-world questions involving variation and uncertainty?

Accepted Answer

It guarantees that all data collected is free from bias and error.

Question 13

A variable records the grade level of students (Freshman, Sophomore, Junior, Senior). This variable is best classified as:

Accepted Answer

Ordinal

Question 14

Which of the following statements about categorical variables is TRUE?

Accepted Answer

Categorical variables can be numeric if the numbers are used for categorizing.

Question 15

A researcher is studying the effect of a fertilizer on plant growth. The plants being observed are:

Accepted Answer

Experimental/Observational Units

Question 16

Which of the following best illustrates the importance of identifying the 'who' and 'what' in a dataset?

Accepted Answer

Being able to analyze and understand the data presented.

Question 17

A variable records the number of advertisements shown to a user on a website. If the researcher groups users by the number of ads seen (e.g., 0-5, 6-10, 11+), what type of variable is this?

Accepted Answer

Categorical

Question 18

Which of the following is a multi-step process for effective data collection?

Accepted Answer

Determine the why, then identify the who and what of your analysis.

Question 19

A survey is conducted to study the relationship between age and preference for a new product. Age is recorded as '18-25', '26-35', '36-45', '46+'. What type of variable is age in this context?

Accepted Answer

Ordinal

Question 20

Which of the following best explains why variation is central to statistics?

Accepted Answer

Variation is what defines data, and statistics helps us find the underlying truth behind it.

Introduction to Statistics: Key Terms and Concepts in Data Collection

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드