Q: Which of the following variables is most likely to be continuous?

Body temperature measured in $$^C$$

Question 1

Which of the following best describes the term 'population' in statistics?

Accepted Answer

The entire group of individuals relevant to the research objective.

Question 2

In the coffee consumption study, what is the sample?

Accepted Answer

The 200 students randomly selected and surveyed.

Question 3

Which step in the process of statistics involves using descriptive statistics to obtain an overview of the data?

Accepted Answer

Describe the data.

Question 4

A researcher wants to know the average cholesterol level (mg/dL) among adults in a city. Which of the following is a quantitative variable in this context?

Accepted Answer

Cholesterol level (mg/dL) measured for each adult.

Question 5

Which of the following is an example of a discrete variable?

Accepted Answer

Number of hospital visits in the past year

Question 6

A bubble tea shop records the amount paid ($) and drink size (ml) for each customer. Which variable is continuous?

Accepted Answer

Drink size (ml)

Question 7

Which statement about qualitative and quantitative variables is correct?

Accepted Answer

Qualitative variables classify individuals based on descriptive attributes.

Question 8

In the context of the bubble tea shop survey, which of the following is a qualitative variable?

Accepted Answer

Drink type

Question 9

Which of the following best describes the difference between discrete and continuous variables?

Accepted Answer

Discrete variables have a finite or countable number of possible values, while continuous variables have an infinite number of possible values that are not countable.

Question 10

A medical researcher records the number of doses of medication taken by patients each day. What type of data is this?

Accepted Answer

Discrete quantitative data

Question 11

Which of the following is an example of using inference in statistics?

Accepted Answer

Estimating the average coffee consumption for all students based on a sample mean.

Question 12

Suppose you want to estimate the average heart rate (beats per minute) of marathon runners. You measure the heart rate of 50 randomly selected runners. Which formula would you use to calculate the sample mean?

Accepted Answer

$$\displaystyle \bar{x} = \frac{\sum_{i=1}^{n} x_i}{n}$$

Question 13

Which of the following variables is most likely to be continuous?

Accepted Answer

Body temperature measured in $$^C$$

Question 14

A survey asks students for their zip code. How should this variable be classified?

Accepted Answer

Qualitative

Question 15

Which of the following is NOT a step in the process of statistics?

Accepted Answer

Ignore the reliability of the results

Question 16

In the bubble tea shop survey, which variable is discrete?

Accepted Answer

Amount paid ($)

Question 17

A researcher wants to know if the payment method (cash, card, mobile pay) affects the amount paid at a bubble tea shop. What type of variable is 'payment method'?

Accepted Answer

Qualitative

Question 18

Which of the following statements about data is correct?

Accepted Answer

Data are facts or propositions used to draw conclusions or make decisions.

Question 19

A scientist records the blood pressure (mmHg) of patients every hour for a day. What type of variable is blood pressure?

Accepted Answer

Continuous quantitative variable

Question 20

Which of the following best explains why researchers use samples instead of populations?

Accepted Answer

It is often impractical or impossible to collect data from the entire population.

Introduction to Statistics: Data Collection and Variables

Guida di studio - Domande di pratica

Study guide - Flashcard