data Science basics

a<-read.csv("C:\\Users\\Thiru\\Desktop\\ExcelR tutorial\\mba.csv")
#windows()
sum(a$gmat)

## [1] 549730

mean(a$gmat)

## [1] 711.1643

median(a$gmat)

## [1] 710

var(a$gmat)

## [1] 860.8188

sd(a$gmat)

## [1] 29.33971

library(e1071)

## Warning: package 'e1071' was built under R version 3.5.1

skewness(a$gmat)

## [1] -0.5931675

kurtosis(a$gmat)

## [1] 1.141141

b <- hist(a$gmat)

pnorm(680,711,29)

## [1] 0.1425426

pnorm(697,711,29)

## [1] 0.3146336

pnorm(740,711,29)

## [1] 0.8413447

#qqnorm(Sample$Number)