AS Stats Vocab

Question 1

population

Answer 1

whole set of items that are of interest

Question 2

census

Answer 2

a study of every member within population

Question 3

sample

Answer 3

selection of observations taken from population subset which is used for information of whole population

Question 4

sampling unit

Answer 4

individual unit/member

Question 5

sampling frame

Answer 5

individually named or numbered list from sampling unit

Question 6

simple random sample

Answer 6

every unit has an equal chance of selection

Question 7

systematic sample

Answer 7

required unit is chosen from list at regular intervals (first unit randomised)

Question 8

stratified sample

Answer 8

list divided into mutually exclusive strata (e.g. age) with random samples taken from each (number dependent on quantity within stratum and population)

Question 9

quota sample

Answer 9

select sample that reflects population characteristics

Question 10

opportunity sample

Answer 10

select sample from available units that fit criteria

Question 11

quantitative data

Answer 11

variables associated with numerical observations

Question 12

qualitative data

Answer 12

variables associated with non-numerical data

Question 13

continuous data

Answer 13

variables that can take any value in given range

Question 14

discrete data

Answer 14

variables that must only be specific value in given range