EDA CH1 T1

Question 1

refers to the field or discipline of study

Answer 1

second meaning of statistics

Question 2

is a group of methods used to collect, analyze, present, and interpret data and to make decisions

Answer 2

statistics

Question 3

consists of methods for organizing, displaying, and describing data by using tables, graphs, and summary measures.

Answer 3

descriptive statistics

Question 4

types of statistics

Answer 4

descriptive and inferential

Question 5

consists of methods that use sample results to help make decisions or predictions about a population.

Answer 5

inferential statistics

Question 6

consists of all elements – individuals, items, or objects – whose characteristics are being studied.

Answer 6

population

Question 7

population that is being studied is also called the

Answer 7

target population

Question 8

A portion of the population selected for study is referred to as a

Answer 8

sample

Question 9

A survey that includes every member of the population is called a

Answer 9

census

Question 10

The technique of collecting information from a portion of the population is called a

Answer 10

sample survey

Question 11

A sample that represents the characteristics of the population as closely as possible is called a

Answer 11

representative sample

Question 12

A sample drawn in such a way that each element of the population has a chance of being selected is called a

Answer 12

random sample

Question 13

If all samples of the same size selected from a population have the same chance of being selected, we call it

Answer 13

simple random sampling

Question 14

such a sample is called

Answer 14

simple random sample

Question 15

an ____ of a sample or population is a specific subject or object (for example, a person, firm, item, state, or country) about which the information is collected.

Answer 15

element or member

Question 16

is a characteristic under study that assumes different values for different elements.

Answer 16

variable

Question 17

the value of a ____ is fixed

Answer 17

constant

Question 18

The value of a variable for an element is called an

Answer 18

observation or measurement

Question 19

is a collection of observations on one or more variables.

Answer 19

data set

Question 20

types of variables

Answer 20

quantitative and qualitative or categorical

Question 21

A variable that can be measured numerically is called a

Answer 21

quantitative variable

Question 22

The data collected on a quantitative variable are called

Answer 22

quantitative data

Question 23

A variable whose values are countable is called a

Answer 23

discrete variable

Question 24

can assume only certain values with no intermediate values.

Answer 24

discrete variable

Question 25

A variable that can assume any numerical value over a certain interval or intervals is called a

Answer 25

continuous variable

Question 26

A variable that cannot assume a numerical value but can be classified into two or more nonnumeric categories is called a

Answer 26

qualitative or categorical variable

Question 27

Data collected on different elements at the same point in time or for the same period of time are called

Answer 27

cross-section data

Question 28

Data collected on the same element for the same variable at different points in time or for different periods of time are called

Answer 28

time-series data

Question 29

sources of data

Answer 29

1. internal sources
2. external sources
3. surveys and experiments