Descriptive Statistics

Types are

• Central tendency
• Dispersion
• Probability Density
• Frequency Distribution
• Cumulative Distribution

Central Tendency:

Measures the central value of a collection of data.

Three measures are mean,mode and median.

1. Mean: Sum of all divided by number of data points
2. Mode: Most frequently occurring number in the data set
3. Median: Middle value when data is arranges in ascending order or descending order

Measures of dispersion

Uses to describe the spread or dispersion.

Four measures are range, variance standard deviation & COV

1. Range: Difference between largest and smallest values
2. Variance
3. Standard Deviation
4. Coefficient of Variation

Probabilty Density

Describes behavior of random variable.