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Further- Chapter 1- Organising and Recognising Data
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What are variables
Thing we record information about
CATEGORICAL
- represents qualities or attribute
NUMERICAL
-represents quantities
-discrete= "how many"
- continuous= measured variables, eg height
What is the mode
The mode or modal value is the most frequently occurring value or category
Explain histogram shape
Symmetrical distribution
-single or double peak where it trails off evenly on either side
Skewed distribution
- histogram trails off predominantly to one side
- right = positive skew
- left = negative skew
Explain histogram outliers
Any data that stands our from the main body of data and therefore atypically high or low
Explain histogram centre
The centre of distribution is the place where half the area of the histogram is on either side
Explain histogram spread
Whether the histogram is narrow or wide
range= largest value - smallest value
Author:
jt.mcrae
ID:
59301
Card Set:
Further- Chapter 1- Organising and Recognising Data
Updated:
2011-01-12 03:35:56
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Organising Recognising Data
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Organising and Recognising Data
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