Data

Question 1

Qualitative data

Answer 1

data described in words

Question 2

Quantitative data

Answer 2

data described in numbers

Question 3

Discrete data

Answer 3

data that is a certain value

Question 4

Continuous data

Answer 4

data that is in numbers with no limit

Question 5

Primary data

Answer 5

data you collect yourself

Question 6

Secondary data

Answer 6

data someone else collects

Question 7

Mode

Answer 7

most common

Question 8

Median

Answer 8

Middle number

Question 9

Range

Answer 9

the difference between the biggest and smallest number

Question 10

Mean

Answer 10

Average = add all numbers together and divide by amount of numbers

Question 11

random sampling

Answer 11

sample chosen at random

Question 12

cluster sampling

Answer 12

population divided into clusters which they naturally fall into

Question 13

stratified sampling

Answer 13

population divided into subgroups then a random sample taken from each subgroup

Question 14

quota sampling

Answer 14

not random, divides population into subgroups then pick a sample from each subgroup but not randomly

Question 15

what are the different quartiles?

Answer 15

upper quartile 75%
median 50%
lower quartile 25%

Question 16

what is interquartile range?

Answer 16

Find upper quartile then take this away from lower quartile
- range between the 2 quartiles

Question 17

what is SD

Answer 17

describes how spread out data is in relation to the mean
greater the SD the more spread out from the mean