Question 1 of 20
If a variable has possible values –2, 6, and 17, then this variable is
A. both a continuous and a discrete variable
B. a continuous variable
C. neither a continuous nor a discrete variable D. a discrete variable Answer Key: D
Question 2 of 20
Which of the following correctly describes the relationship between a sample and a population?
A. A population and a sample are not related. B. A sample is a group of subjects selected from a population to be studied. C. A sample is a group of populations that are subject to observation. D. A population is a group of samples that may or may not be included in a study
Answer Key: B
Question 3 of 20
What is the term for a characteristic or attribute that can assume different values?
expo nent B. datu m
sam ple D. varia ble
Answer Key: D
Question 4 of 20
If you classified the fruit in a basket as apple, orange, or banana, this would be an example of which level of measurement?
ordi nal B. ratio C. nom inal
inter val Answer Key: C
Question 5 of 20
The amount of time needed to run the Boston marathon is an example of which type of variable?
A. contin uous
discret e C. qualita tive
none of the above Answer Key: A
Question 6 of 20
An advertisement for a car states that it is 10% more powerful than its competitor. This is an example of
ambigu ous average s B. suspect sample s C. changin g the subject D. detache d statistic s
Answer Key: D
Question 7 of 20
What type of sampling is being employed if the population is divided into economic classes and a sample is chosen from each economic class to be surveyed?
A. cluster samplin g B. random samplin g C. systema tic samplin g
stratifie d samplin g Answer Key: D