Question 1

A researcher wants to estimate the average length of books in a library. She randomly selects 5 books from each bookcase and measures their length. Which sampling method is being used?

Accepted Answer

Stratified Sample (Strat)

Question 2

In a clinical trial, 188 patients are randomly selected and given a 20-mg dose of Lipitor. 3.7% of them experience nausea. What type of study is this?

Accepted Answer

Experiment (E)

Question 3

A news crew asks neighbors whether a suspect is 'friendly' or 'antisocial.' What type of data is being collected?

Accepted Answer

Categorical Data (Cat)

Question 4

A researcher measures the surface temperature of a lake by stretching a rope across the lake and taking a temperature every 5 meters. Which sampling method is used?

Accepted Answer

Systematic Sample (Sys)

Question 5

Ten bags of M&Ms are obtained from the bookstore, and the number of each color of M&M is counted. What type of data is being collected?

Accepted Answer

Discrete Data (D)

Question 6

To judge the average restaurant quality in Minneapolis, a random number generator selects 100 restaurants from the yellow pages and each is given 1-5 stars. What is the level of measurement for the star ratings?

Accepted Answer

Ordinal (O)

Question 7

On election day, ABC News organizes an exit poll by randomly selecting 20 polling stations in each state and asking all exiting voters who they voted for. What sampling method is this?

Accepted Answer

Cluster Sample (Clus)

Question 8

A researcher randomly selects 100 people and weighs them before and after the Atkins diet. What type of study is this?

Accepted Answer

Experiment (E)

Question 9

The Department of Agriculture measures the percentage tree cover in 10-km-wide squares at every 1° of latitude and longitude. What sampling method is being used?

Accepted Answer

Cluster Sample (Clus)

Question 10

To estimate average word length in English, data is collected by randomly selecting 20 different pages from the printed Merriam-Webster Dictionary and measuring the length of the words on each page. What sampling method is used?

Accepted Answer

Simple Random Sample (SRS)

Question 11

Which of the following is an example of ratio level of measurement?

Accepted Answer

Measuring the length of books in centimeters

Question 12

A researcher wants to study the effectiveness of a new drug. She randomly assigns patients to receive either the drug or a placebo and measures their blood pressure before and after treatment. Which best describes this study?

Accepted Answer

Experiment (E)

Question 13

Which of the following best describes interval level of measurement?

Accepted Answer

Temperature measured in Celsius

Question 14

If a researcher selects every 10th person entering a hospital to participate in a survey, which sampling method is being used?

Accepted Answer

Systematic Sample (Sys)

Question 15

Which of the following is NOT a characteristic of a simple random sample?

Accepted Answer

Members are selected based on convenience

Question 16

A researcher wants to study the average height of students in a university. She divides the students by major and randomly selects 10 students from each major. What sampling method is this?

Accepted Answer

Stratified Sample (Strat)

Question 17

Which of the following is an example of continuous data?

Accepted Answer

Length of a book measured in centimeters

Question 18

A researcher wants to estimate the average income of residents in a city. She selects 5 neighborhoods and surveys all residents in those neighborhoods. What sampling method is this?

Accepted Answer

Cluster Sample (Clus)

Question 19

Which of the following best describes nominal level of measurement?

Accepted Answer

Assigning numbers to categories such as 'friendly' or 'antisocial'

Question 20

A researcher wants to study the effectiveness of a new teaching method. She selects students who are available at the time of her visit. What sampling method is this?

Accepted Answer

Convenience Sample (Con)

Introductory Statistics: Sampling Methods, Data Types, and Measurement Levels

Guida di studio - Domande di pratica

Study guide - Flashcard