Using a Frequency Polygon, Sydney Plotted the Incomes of Families

question 22

Multiple Choice

Using a frequency polygon, Sydney plotted the incomes of families living in the Ritz Crescent area of town. She discovered that very few families had low incomes, about a quarter had medium incomes, and the majority had high incomes. It would appear that the distribution of family income in Ritz Crescent:

• A)is negatively skewed.
• B)has little or no variability.
• C)is positively skewed.
• D)is symmetrical.

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Definitions:

Memory Cells

A type of lymphocyte that remains in the body for a long time after infection or vaccination, providing immunity by remembering the pathogen.

Adaptive Immunity

The branch of the immune system that involves memory, allowing for a faster and more specific response to pathogens previously encountered.

Plasma Cells

A type of white blood cell that produces and secretes large volumes of antibodies.