# Data and descriptive analysis

• Created by: Millie
• Created on: 28-05-14 13:01
Data that is numerical and often expresses the 'quantity' of something
Quantitative data
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One advantage of this type of data is that it is in depth and detailed
Qualitative data
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A level of measurement where data are in separate catergories
Nominal data
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A level of measurement where data is ordered in some way
Ordinal data
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A measurement where there is a true zero point and equal intervals between units, as in most measures of physical quantities
Interval data
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A level of measurement where units of equal intervals are used such as counting correct answers
Ratio data
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A calculation of the average number out of a set of data
Mean
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A descriptive statistic that provides information about a 'typical' number for a data set
Measure of central tendency
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The middle value of a set of scores when placed in rank order
Median
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The difference between the highest and lowest score in a set of data
Range
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The most frequently occurring score in a set of data
Mode
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A descriptive statistic that gives us information about how spread out a set of scores is
Dispersion
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Data that is detailed and is written in word. Often expresses the 'quality of something
Qualitative data
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The middle quarter of a set of data
Inter quartile range
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A measure of how far all scores are spread out from the mean
Standard deviation
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One disadvantage of this type of data is that it takes into account extreme values and so may be skewed
Mean
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## Other cards in this set

### Card 2

#### Front

One advantage of this type of data is that it is in depth and detailed

Qualitative data

### Card 3

#### Front

A level of measurement where data are in separate catergories

### Card 4

#### Front

A level of measurement where data is ordered in some way

### Card 5

#### Front

A measurement where there is a true zero point and equal intervals between units, as in most measures of physical quantities