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 classroom. What type of data is this?

Accepted Answer

Continuous data

Question 3

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

Accepted Answer

The types of cuisine (Italian, Chinese, Mexican) preferred by survey respondents

Question 4

Which of the following statements about big data is TRUE?

Accepted Answer

Big data analysis may require software running in parallel on many computers.

Question 5

A survey asks respondents to rate their satisfaction as 'satisfied', 'neutral', or 'dissatisfied'. What is the level of measurement?

Accepted Answer

Ordinal

Question 6

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 7

Which of the following best describes the difference between interval and ratio levels of measurement?

Accepted Answer

Ratio data has a natural zero point, while interval data does not.

Question 8

A data value is missing completely at random if:

Accepted Answer

The likelihood of its being missing is independent of its value or any other values.

Question 9

Which method involves substituting values for missing data in a dataset?

Accepted Answer

Imputing missing values

Question 10

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

Accepted Answer

Interval

Question 11

Which of the following is a key concept in statistics?

Accepted Answer

Using sample data to make conclusions about populations

Question 12

A medical researcher collects the blood pressure readings of 100 patients. Which type of data is this?

Accepted Answer

Continuous

Question 13

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

Accepted Answer

Differences between data values are meaningful

Question 14

Which of the following is an example of a statistic?

Accepted Answer

The median income of a randomly selected group of 50 households

Question 15

A researcher wants to study the effect of a new drug. She collects data from a randomly selected group of patients. What is the group of patients called?

Accepted Answer

Sample

Question 16

Which of the following best describes categorical data?

Accepted Answer

Data that consists of names or labels

Question 17

A researcher records the number of times a coin is tossed before getting tails. What type of data is this?

Accepted Answer

Discrete

Question 18

Which of the following is a real-world example of ratio level data?

Accepted Answer

Class times of 50 minutes and 100 minutes

Question 19

Which of the following is NOT a method for correcting missing data?

Accepted Answer

Ignoring the missing data

Question 20

Which of the following best describes data science?

Accepted Answer

The application of statistics, computer science, and software engineering, along with other relevant fields

Introduction to Statistics: Key Concepts and Data Types

Guida di studio - Domande di pratica

Study guide - Flashcard