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 collects the heights (in centimeters) of all students in a university. Which 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 students present in a classroom

Question 4

A survey asks respondents to indicate their level of agreement with a statement: 'Strongly Disagree', 'Disagree', 'Neutral', 'Agree', 'Strongly Agree'. What is the level of measurement for this data?

Accepted Answer

Ordinal

Question 5

Which of the following statements about interval and ratio levels of measurement is correct?

Accepted Answer

Both interval and ratio data can be ordered, but only ratio data have a meaningful zero.

Question 6

Which of the following is an example of categorical data?

Accepted Answer

The blood type (A, B, AB, O) of patients in a hospital

Question 7

A data set records the years in which major historical events occurred (e.g., 1492, 1776, 2000). What is the level of measurement for this data?

Accepted Answer

Interval

Question 8

Which of the following best describes continuous data?

Accepted Answer

Data that can take on any value within a given range

Question 9

A scientist records the time (in seconds) it takes for a medicine to dissolve in water. What is the level of measurement for this data?

Accepted Answer

Ratio

Question 10

Which of the following is a correct statement about missing data?

Accepted Answer

Data missing not at random means the missingness is related to the reason it is missing.

Question 11

A hospital records the number of patients admitted each day for a month. What type of data is this?

Accepted Answer

Discrete quantitative data

Question 12

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

Accepted Answer

The types of fruits (apple, banana, orange) sold at a market

Question 13

A researcher wants to estimate the average income of all households in a city. She collects data from 500 randomly selected households. The average income calculated from these 500 households is an example of:

Accepted Answer

A statistic

Question 14

Which of the following best describes big data?

Accepted Answer

Data sets so large and complex that traditional software tools cannot analyze them

Question 15

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

Accepted Answer

There is no meaningful order to the data

Question 16

A researcher records the shirt numbers of soccer players. Which type of data is this?

Accepted Answer

Categorical data

Question 17

Which of the following is the best example of ordinal data?

Accepted Answer

The medal types (gold, silver, bronze) awarded in the Olympics

Question 18

Suppose a data value is missing completely at random. Which of the following is true?

Accepted Answer

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

Question 19

Which of the following is a valid method for handling missing data in a data set?

Accepted Answer

Delete all subjects with any missing values

Question 20

A data scientist is analyzing a data set with millions of records and complex relationships. Which field combines statistics, computer science, and software engineering to address such problems?

Accepted Answer

Data science

Introduction to Statistics: Key Concepts and Types of Data

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