Exam 4- Stats

Question 1

The science of assembling, classifying, tabulating, and analyzing data of a numerical nature to present significant information about a given subject

Answer 1

Statistics

Question 2

A way of summarizing data from population or sample

Answer 2

Descriptive stats

Question 3

A comparison of data, extrapolation (outbound of objectives)

Answer 3

Statistical inference

Question 4

A collection of information, a set of values of qualitative or quantitative variables

Answer 4

Data

Question 5

Qualitative data

Answer 5

Non-numeric data (data cannot be counted)

Question 6

Quantitative Data

Answer 6

Numeric data ( data that can be counted)

Question 7

assigning numbers to observations according, to pre-set rules

Answer 7

Measurement

Question 8

A measured characteristics that can have various values or levels

Answer 8

Variable

Question 9

Discrete variables

Answer 9

Quantitative, can have only certain valves (usually whole #s)

Question 10

Continuous variables

Answer 10

Quantitative , can have any vale (whole #, decimals/fractions)

Question 11

Have 2 positive values (1/0) or (t/f)

Answer 11

Binary variables

Question 12

3 types of qualitative variables

Answer 12

1) Binary
2) Nominal
3) Ordinal

Question 13

2 types of Quantitative variables

Answer 13

1) discrete

2) continuous

Question 14

An entire group of observations that (might) have at least 1 characteristic in common

Answer 14

Population

Question 15

A group of elements selected from the total population

Answer 15

Sample

Question 16

A characteristic of a population

Answer 16

parameter

Question 17

A characteristic of a sample

Answer 17

Statistic

Question 18

2 ways to summarize data

Answer 18

1) text

2) graphical

Question 19

The total number of observations/events

Answer 19

Absolute frequency

Question 20

Proportion of in=bservations/events

Answer 20

Relative frequency