Unit 3: Statistics

Question 1

Statistics

Answer 1

Science pertaining to collection, organization, display, analysis and/or interpretation of data

Question 2

Data

Answer 2

Specific info collected/measured/observed

Question 3

Primary data

Answer 3

Information collected firsthand

Question 4

Secondary data

Answer 4

Obtained from studies conducted by other researchers

Question 5

Microdata

Answer 5

Collected from objects and recorded

Question 6

Aggregate data

Answer 6

Data is combined and organized into a table/graph

Question 7

Qualitative/categorical data

Answer 7

Non numerical (in words)

Question 8

Nominal

Answer 8

Qualitative data w/ no natural order (alphabetic doesn’t count)

Question 9

Ordinal

Answer 9

Qualitative data w/ a natural order

Question 10

Quantitative

Answer 10

Numerical

Question 11

Discrete data

Answer 11

Quantitative data w/ a finite number of values (limited)

Question 12

Continuous

Answer 12

Quantitative data w/ infinite # of of values (ex: put into intervals)

Question 13

Experimental data

Answer 13

Data that is collected from conducting an experiment

Question 14

Observational data

Answer 14

Data that is collected from watching something happen

Question 15

Random sample

Answer 15

Chosen from entire population randomly (each member of pop’n has equal chance of being selected )

Question 16

Voluntary sample

Answer 16

Members of population participate in survey on voluntary basis

Question 17

Convenience sample

Answer 17

Selects members of population that are easily accessible

Question 18

Destructive sample

Answer 18

Random sample taken; each destroyed during testing

Question 19

Systematic sample

Answer 19

Members of sample chosen at regular intervals (ex: every fifth member chosen)

Question 20

Stratified sample

Answer 20

Population divided into groups w/ similar characteristics; proportional amount chosen from each group

Question 21

Strata (singular: stratum)

Answer 21

Groups in sample with similar characteristics; ex: age, gender, job, etc)

Question 22

Cluster sample

Answer 22

Population divided into groups; a sample that only some of the strata pull from (ex: prom survey only asks gr. 12s)

Question 23

Multi stage sample

Answer 23

Population divided into strata; then further divided into more strata; used several layers of clustering

Question 24

Sample size depends on:

Answer 24

-pop’n size
- variability of pop’n
-degree of precision required in study
- sampling method chosen