- The expected value(Mean) measures the central tendency, or the center of gravity of the population
- It is given by:
- A family has 4 members, father, mother and 2 kids Hemal and Rishi who are twins. The average age of the family members is 20 years. Age of mother and father is 30 and 32 respectively.
- Can you tell the age of Hemal?
- The graph shows the mean of normal distributions