11.4 Standard Deviation

Standard deviation tells us how much the data varies from the average

A small standard deviation means the data is very close to the mean

A large standard deviation means the data can be very far away from the mean

My age is 30, my husband is 29, and my daughter is 2

The mean age of people in my house is 20.3

Does that accurately represent the ages of people in my house?

What would you guess about the standard deviation?