Descripive Statistics

Descriptive statistics : is one of the main banches of data analytics.It is answering “what happens in the data”?.

It is classified into 5 main categories including:

measure of central tendancy
measure of variation or dispersion
measure of shapes
measure of positions, and
measure of frequency.

We will cover by the following order:

Data cleaning,
Data transformation,
Data measurement,
Data validation, and
Data visualization.

Measure of central tendency

Measure of central tendency acting as the back bone of the descriptive statistics.

7main elements are the foundations of the central tendency including:

Mean,
Mode,
Median,
Mid-range,
Maximum,
Minimum, and
Mad

Mean

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

Arithmetic mean,
Geometric mean,
Harmonic mean
Trimmed mean, and
Weighted mean

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

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)