Chapter 1

Question 1

Individuals

Answer 1

the objects described by a set of data (people, animals, things)

Question 2

Variable

Answer 2

any characteristic of an individual

Question 3

T:F Can a variable take different values for different individuals

Answer 3

True

Question 4

Categorical Variable

Answer 4

places an individual into one of several groups/categories

Question 5

Numerical Variable/ Quantitative Variable

Answer 5

takes numerical values for which arithmetic operations like adding and averaging make sense

Question 6

Response

Answer 6

a variable that measures an outcome or result of a study

Question 7

Observational Study

Answer 7

observes individuals and measures variables but does not intervene or influence

Question 8

What is the purpose of an Observational Study?

Answer 8

To describe some group or situation

Question 9

Population

Answer 9

in a statistical study, it is the entire group of individuals about which the information is wanted

Question 10

Sample

Answer 10

the part of the population from which we actually collect information and use to draw conclusions about the population

Question 11

Census

Answer 11

sample survey that attempts to include entire population

Question 12

Experiment

Answer 12

deliberately impose some treatment on individuals in order to observe the response

Question 13

What is the purpose of an Experiment?

Answer 13

to study whether the treatment changes the individual’s response