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, continuous data

Question 3

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

Accepted Answer

Types of cuisine: Italian, Chinese, Mexican

Question 4

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

Accepted Answer

Ordinal

Question 5

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 6

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

Accepted Answer

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

Question 7

Which of the following is an example of discrete data?

Accepted Answer

The number of cars passing through an intersection in an hour

Question 8

A researcher collects the years when major historical events occurred (e.g., 1776, 1945, 2001). What is the level of measurement?

Accepted Answer

Interval

Question 9

Which of the following best describes the difference between a statistic and a parameter?

Accepted Answer

A statistic describes a sample, while a parameter describes a population.

Question 10

A scientist measures the time (in seconds) it takes for a chemical reaction to complete. What is the level of measurement?

Accepted Answer

Ratio

Question 11

Which of the following is a correct method for handling missing data?

Accepted Answer

Impute missing values by substituting them with estimated values.

Question 12

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

Accepted Answer

Categorical (qualitative) data

Question 13

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

Accepted Answer

There is no natural zero starting point.

Question 14

A teacher assigns letter grades (A, B, C, D, F) to students. What is the level of measurement?

Accepted Answer

Ordinal

Question 15

Which of the following scenarios best illustrates data missing not at random?

Accepted Answer

Patients with higher medical bills are less likely to report their bill amounts.

Question 16

Which of the following is an example of using data science?

Accepted Answer

Combining statistics, computer science, and software engineering to analyze social media trends.

Question 17

A researcher counts the number of defective products in each batch produced by a factory. What type of data is this?

Accepted Answer

Quantitative, discrete data

Question 18

Which of the following best describes the interval level of measurement?

Accepted Answer

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

Question 19

A sports team assigns jersey numbers to players. What is the level of measurement for these numbers?

Accepted Answer

Nominal

Question 20

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

Accepted Answer

The time it takes for a runner to finish a marathon

Week 1- 1.2

Study Guide - Practice Questions