Question 1

Which of the following best describes a parameter?

Accepted Answer

A numerical measurement describing some characteristic of a population.

Question 2

A researcher records the heights (in centimeters) of all students in a class. What type of data is this?

Accepted Answer

Quantitative data

Question 3

Which of the following is an example of discrete data?

Accepted Answer

The number of cars passing through a toll booth in an hour.

Question 4

Which level of measurement is appropriate for the following data: 'Strongly Agree, Agree, Neutral, Disagree, Strongly Disagree'?

Accepted Answer

Ordinal

Question 5

A scientist measures the time (in seconds) it takes for a chemical reaction to complete. Which level of measurement does this represent?

Accepted Answer

Ratio

Question 6

Which of the following statements about big data is correct?

Accepted Answer

Big data refers to data sets so large and complex that traditional software tools cannot analyze them.

Question 7

If a data value is missing completely at random, what does this imply?

Accepted Answer

The likelihood of its being missing is independent of its value or any other values in the data set.

Question 8

Which of the following is an example of categorical data?

Accepted Answer

The brand names of smartphones owned by students.

Question 9

A researcher collects the birth years of participants (e.g., 1990, 1985, 2000). What is the level of measurement?

Accepted Answer

Interval

Question 10

Which method is commonly used to handle missing data by substituting values for them?

Accepted Answer

Impute missing values

Question 11

A survey asks respondents to select their favorite color. What is the level of measurement for this data?

Accepted Answer

Nominal

Question 12

Which of the following best describes a statistic?

Accepted Answer

A numerical measurement describing some characteristic of a sample.

Question 13

Which of the following is an example of continuous data?

Accepted Answer

The time it takes for a runner to finish a race.

Question 14

A researcher deletes all subjects with any missing values from a data set. What method is being used?

Accepted Answer

Delete cases

Question 15

Which of the following is NOT a characteristic of the ratio level of measurement?

Accepted Answer

There is no natural zero starting point.

Question 16

A hospital records the blood types (A, B, AB, O) of patients. What type of data is this?

Accepted Answer

Categorical data

Question 17

Which of the following best describes data science?

Accepted Answer

It involves applications of statistics, computer science, and software engineering, along with other relevant fields.

Question 18

A researcher is interested in the average income of all households in a city. The value calculated from a sample of 100 households is called:

Accepted Answer

A statistic

Question 19

Which of the following is an example of data at the nominal level of measurement?

Accepted Answer

Types of cuisine: Italian, Chinese, Mexican, Indian

Question 20

A study records the number of goals scored by each soccer player in a season. What type of data is this?

Accepted Answer

Discrete data

Introduction to Statistics: Key Concepts and Data Types

Guida di studio - Domande di pratica