Question 1

Which of the following best describes the variable 'Amount Paid' in the Seattle parking meter data table?

Accepted Answer

Quantitative, continuous

Question 2

In the study about chronic fatigue syndrome, what is the population of interest?

Accepted Answer

All patients with chronic fatigue syndrome

Question 3

Which sampling method is described when a sociologist randomly selects 20 city blocks and surveys all households within those blocks?

Accepted Answer

Cluster sampling

Question 4

A company tests 20 units out of every shipment of 200 units by destroying them. What is the sample in this scenario?

Accepted Answer

The 20 units tested from each shipment

Question 5

Which of the following is an example of a parameter?

Accepted Answer

The proportion of all US males who own a car

Question 6

What type of variable is 'Parking Space Number' in the Seattle parking meter data?

Accepted Answer

Qualitative, nominal

Question 7

A survey is conducted by asking all people in a restaurant how often they eat out. What type of bias is most likely present?

Accepted Answer

Sampling bias due to convenience sampling

Question 8

Which of the following best describes the process of statistics?

Accepted Answer

Identify research objective, collect data, describe data, perform inference

Question 9

In the Seattle parking meter data, which variable is best classified as qualitative, nominal?

Accepted Answer

Side of Street

Question 10

A manager surveys every 7th customer exiting a store, starting with a randomly chosen number between 1 and 7. What sampling method is this?

Accepted Answer

Systematic sampling

Question 11

Which of the following is an example of an observational study?

Accepted Answer

Gathering data from medical records of patients who took drug A or drug B

Question 12

Which variable in the Seattle parking meter data is quantitative and discrete?

Accepted Answer

Parking Space Number

Question 13

A study reports that 13% of Americans are left-handed. What is the population?

Accepted Answer

All Americans

Question 14

Which of the following best describes a census?

Accepted Answer

A study that includes every individual in the population

Question 15

If a survey is given only in English in a diverse city, which type of bias is most likely?

Accepted Answer

Undercoverage bias

Question 16

Which of the following is an example of inferential statistics?

Accepted Answer

Estimating the average height of all students at a university based on a sample

Question 17

In a stratified sample, what is the main purpose of dividing the population into strata?

Accepted Answer

To ensure each group is homogeneous

Question 18

Which of the following is a multi-step problem involving both descriptive and inferential statistics? Suppose you record the weights of 100 randomly selected adults and calculate the mean. You then use this mean to estimate the average weight of all adults in your city. What is the correct sequence?

Accepted Answer

Descriptive statistics followed by inferential statistics

Question 19

Which equation correctly represents the proportion of good outcomes in the treatment group for the chronic fatigue syndrome study?

Accepted Answer

$$\frac{19}{27}$$

Question 20

A researcher wants to know the average amount of money students at UW Madison spend on textbooks in Fall 2024. She surveys 100 students. What is the statistic in this scenario?

Accepted Answer

The average amount spent by the 100 surveyed students

Chapter 1: Data Collection – Structured Study Notes for Introductory Statistics

Guida di studio - Domande di pratica

Study guide - Flashcard