A group of 10 students participated in a study of nutritional awareness.What is the sample variance 
of their scores?
20,19,22,20,15,18,15,21,19,20
Definitions:
Classes
Social strata that categorize individuals based on factors like wealth, income, education, occupation, and power.
Family Therapy
A form of psychotherapy that aims to resolve family problems and improve communication and understanding among family members.
Family Communication
The ways in which family members interact and exchange information, feelings, and meanings with each other.
Family Interaction
The dynamic and communication patterns between members of a family system, influencing individual behavior and family functioning.
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