Chapter 1-4

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20 Terms

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Marginal distribution

use margins

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conditional distribution

use inside (indeepent if all numbers are the same)

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To describe distribution

shape, spread, center, and unusual

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5
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shape

bi/unimodal

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spread

IQR/SD and range

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center

mean and median

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unusual

outliers and gaps

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If distribution is symmetric

use mean/SD

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If skewed

use median and IQR

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median

middle number when data is ordered

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range

max-min

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IQR

Q3-Q1

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Lower fence

Q1-1.5IQR

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Upper Fence

Q3+1.5IQR

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Affected by outliers

mean/SD

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Q1

25%

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Q3

75%

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SD

average distance of each data value to the mean

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5 number summery

median, Q1, Q3, max, and min