data analysis Flashcards
1
Q
4 levels of measurement ?
A
- nominal
- ordinal
- interval
- ratio
2
Q
nominal data ?
A
categorising data
- number of people who like diff foods
3
Q
ordinal?
A
ranking data
- rank fav TV shows in order of liking
4
Q
interval ?
A
when there is no true zero
- temperature
5
Q
ratio?
A
when there is an absolute zero
- height and weight
6
Q
measures of central tendency ?
A
- mean
- mode
- median
7
Q
strength and weakness of mean?
A
strength - most sensitive data takes into account all data
weakness - easily distorted by extreme values
8
Q
strengths and weakness of median?
A
strength - not affected by extreme scores
weakness - not all data reflected
9
Q
strengths and weakness of mode ?
A
strength - not affected by extreme scores
weakness - not useful when several modes
10
Q
measures of dispersion?
A
- range
- standard deviation
