Types of Data Notes
Honors Biology
There are two main types of data:
1. Quantitative data: Amount (Numbers)
2. Qualitative data: Qualities (Looks)
Nominal Data: Example: Political affiliation
Ordinal Data: Something that goes in order
Measure of Central Tendency – the one number that is most typical of the entire set of data.
1. Mode: Whatever is most often
Data Set #1:
7
6
5
5
4
3
mode 5
Data Set #2
10
10
8
7
7
5
mode 10 and 7
Data Set #3
red
red
blue
pink
gray
green
mode red
median 5
2. Median: the middle
Data Set #1
7
6
5
5
4
3
Data Set #2
15
13
12
11
9
9
9
median 11
3. Mean: average
Data Set #1
7
6
5
5
4
mean 5.4
Data Set #2
15
13
12
11
9
mean 12