# Maths

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• Created by: Rosalind
• Created on: 15-04-14 15:19
Quantative Data
Data recorded in words
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Qualitative Data
Data recorded in numbers
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Discrete data
finite number e.g. number of cars
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Continuous Data
e.g. length
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Methods of Data collection
Observation, survey/questionnaire, experiment or data logging
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Finding mean from frequency table
frequency x midpoint divided by frequency
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Range
largest value - smallest value
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Interquartile range
upper quartile - lower quartile
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Frequency polygon
line graph always plotted from midpoint
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Estimate frequency on a histogram
area under the histogram bar
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P(A or B)
P(A) + P(B)
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P(A and B)
P(A) x P(B)
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Estimating probability from frequency table
frequency divided by total frequency
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Cumulative frequency graphs
plot from end of class
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## Other cards in this set

### Card 2

#### Front

Data recorded in numbers

Qualitative Data

### Card 3

#### Front

finite number e.g. number of cars

e.g. length

### Card 5

#### Front

Observation, survey/questionnaire, experiment or data logging