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STAT 3743 Daily Outline

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2010-09-08 Wed

Measure of spread: range

Advantages and disadvantages

Ex: stack.loss

Sample skewness

Ex: stack.loss
Ex: discoveries (check rule of thumb)

Sample excess kurtosis

Ex: stack.loss
Ex: UKDriverDeaths (check rule of thumb)

Exploratory data analysis

Hinges and the Five number summary

Upper, lower hinges

5NS

fivenum

Boxplots

Visual display of the 5NS

Can judge CUSS

Outliers

Potential versus suspected

Rules of thumb for both

Ex: rivers

Standardizing variables

Measure of relative standing: z-score

scale

Ex: precip

Bi/Multivariate data

Data frames: rectangular arrays of data

same number of rows each column
data in each column must be same type
indexing: two dimensional

Access columns of data frames in multiple ways

Author: G. Jay Kerns <gkerns@ysu.edu>

Date: 2010-10-08 15:16:59 EDT

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