The Average Grade of a Sample of 25 Students on Their

question 39

Essay

The average grade of a sample of 25 students on their second statistics examination was 85 with a standard deviation of 9. Is the variance of the population significantly more than 80? Use a 0.05 level of significance.

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Definitions:

Distal

Anatomical term meaning farther away from a point of attachment or farther away from the trunk of the body.

Diffusion

The movement of a substance from an area of high concentration to an area of low concentration.

Drainage

The removal of water or liquid from a place or object, often using pipes or channels.

Phenylketonuria (PKU)

A genetically inherited disorder in which the body cannot properly metabolize the nutrient phenylalanine, resulting in the buildup of phenylketones in the blood and their presence in the urine. The accumulation of phenylketones results in mental retardation.