stats_Chapter 2

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Chapter 2 Dr Wayne Stewart

Obtain account on GITHUB

Tools → terminal

Configure GIT (Use terminal) git config —global user.name ‘Jane Doe’ git config —global user.email ‘jane@example.com’ git config —global —list

DDT data set ddt ← read.csv(file.choose())

To answer these questions we need to wrangle the data. We will use subsetting rules and a package called “dplyr”

Plots

Qualitative Data

Plots

Quantitative data

Histograms

Histogram in R

Numerical methods for describing

Quantitative data

Central tendency

Measures of variation

The empirical rule

Chebyshev’s Rule

Measures of relative standing

Z-score

Can this method of detection be improved?

Leave one out statistics 𝒙𝒊 − 𝒙−𝒊 𝒁−𝒊 = 𝒔−𝒊

Outliers and their detection

Using boxplots for outlier detection

OUT !!!

Outliers