Lecture 3 Flashcards Preview

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Flashcards in Lecture 3 Deck (14)
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1

Measures of location

center of the dataset/distribution

2

measures of variation

define variation around centre

3

location

typical or central value that best describes the data

4

mode

number repeated most often
- may not exist
- not affected by outliers

5

median

middle value
- always exist
- not affected by outliers

6

weighted mean

data points don't all contribute the same amount

7

calculating median

to find position:
(n+1)/2 if odd
n/2 if even

8

nominal variable

data cannot be ordered (qualitative)

9

ordinal variable

data can be ordered (qualitative)

10

quantitative variables

data are ordinary real numbers

11

median divides

into 2

12

quartiles

divides into 4 parts

13

deciles

divides into 10 parts

14

percentiles

divides into 100 parts