**Statistics**is the science of learning from Data.

Data is essentially numbers (or text/symbols) which represent some information.

It helps to think of data as 'value' of quantitative and qualitative variables

What are the variable types :

Numerical or Quantitative: (Continuous and Discrete)

Categorical or Qualitative: (Always discrete)

- Normal

- Ordinal

Descriptive Statistics

Quantitatively describing the data

- Graphical representation

- Tabular representation

- Summary statistics

Descriptive versus Inferential. The use of sample and Population

Single and Multiple variable

Distributions and Relationships

**Graphical Representation : Single Variable**

**For Categorical Variables :-**

**For Quantitative Variables :-**

**Graphical Representation : Multiple Variables**

Scatter Plots: Two quantitative variables

Box plots - One categorical with one quantitative variable

Contingency tables - categorical variables with frequency of occurrence as the theme.

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