An instructor is evaluating the performance of students on a test. He records the number of points that each student missed and created a frequency distribution. This is provided below: 
What is the variance for this population?
Definitions:
Brittle Nails
A condition where nails easily break, crack, or split, often indicative of nutritional deficiencies or underlying health issues.
Dietary Intake
The amounts and types of foods and beverages consumed by an individual.
Fungal Infection
An infectious condition caused by fungi invading the skin, nails, or other parts of the body, leading to various symptoms.
Closed Head Injury
A type of traumatic brain injury where the skull is not penetrated or fractured.
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