1. R Example Descriptive Statistics Frequency and Histogram Diagrams Standard Deviation

2. Excel Bar Histogram Box / CI’s Line Scatter Pie

3. Correlation Matrix BoxplotHistogram Scatterplot

4. > getwd() [1] "C:/Users/johnp_000/Documents" > setwd()

5. Revisiting the Height Dataset

6. Dataset Input Function Filename Object

7. str() Data Types: Numbers and Factors/Categorical

8. summary() ece

9. Frequency Distribution, Histogram hist(h$childHeight)

10. Area = 1 Density Plot plot(density(h$childHeight))

11. hist(h$childHeight,freq=F, breaks =25, ylim = c(0,0.14)) curve(dnorm(x, mean=mean(h$childHeight), sd=sd(h$childHeight)), col="red", add=T) Bimodal: two modes Mode, Bimodal

12. Composite Charts

13. Boxplot (Box and Whiskers) 50th 75th 25th

14. Boxplot Options BasicWith Mean Split Data Among Predictors

15. Correlation Covariance is High: r ~1 Covariance is Low: r ~0

16. Galton: Height Dataset cor(h) Error in cor(h) : 'x' must be numeric Initial workaround: Create data.frame without the Factors cor() function does not handle Factors Later we will RECODE the variable into a 0, 1 Excel correl() does not either Data Types: Numbers and Factors/Categorical

17. Correlation Matrix for Continuous Variables chart.Correlation(num2) PerformanceAnalytics package

18. Correlations Matrix: Both Types library(car) scatterplotMatrix(heights)