Measure of Central Tendency

• Mean • Sum of Values divided by Number of Values • Also called Arithmetic Average • Impacted by outliers; Cannot be used for Categorical variables

• Median • Middle value in a distribution when the values are arranged ascending or descending

• Mode • Most commonly occurring value in a distribution • Can be applied to both Categorical and Numerical Variables

Mean, Median, Mode e.g.

15 students are there in a Tiny Tots class.

The age in months of the students is given below:

•𝑴𝒆𝒂𝒏 𝑨𝒈𝒆 = 24 + 37 + 38 + 38 + 36 + 39 + 40 + 37 + 38 + 41 + 40 + 36 + 37 + 37 + 39 /15 = 𝟑𝟕.𝟏𝟑

Median Age : Sort the values in ascending order. The Middle Value is Median : 38

Mode: Highest Repeating Age - 37

2nd Example - Household Expense Data