Descriptive statistics

descriptive statistics

descriptive statistics : is one of the main branches of data analytics . it is answering ” wht happens in data “

• it is classified into 5 main categories including

1. measure of centeral tendancy
2. measure of variation or dispersion
3. measure of shapes
4. measure of positions
5. measure of frequency

• we will cover by the following order :

1. data cleaning .
2. data transformation
3. data measurement iv data validation and v . data vizualization

measure of central tendancy

measure of central tendancy acting as the back bone of the descriptive statistics

7 main elemants are the foundations of the central tendecy including

• mean,
• mode,
• median,
• mid _range ,
• maximum
• minimum, and
• mad

mean

in statistics , there are more than 7 types of mean including:

1. Arithmetic,
2. Geometric mean,
3. Harmonic mean,
4. Trimed mean, and
5. weighted mean

\[x^2=x^2n-\alpha+\eta-\beta\]

x<-c( 11, 12,11,14,11,13,14,16,17,11,11)
summary(x)

##    Min. 1st Qu.  Median    Mean 3rd Qu.    Max. 
##   11.00   11.00   12.00   12.82   14.00   17.00

boxplot(x)

plot(density(x))

hist(x)