Scores of Adults Aged 60 to 64 on a Common

question 35

Multiple Choice

Scores of adults aged 60 to 64 on a common IQ test are approximately Normally distributed with mean 90 and standard deviation 15.
Suppose we call an IQ of 90 "normal" for adults aged 60 to 64. What percent of the population have "below normal" IQs?

• A) About 50%
• B) Less than 50%
• C) More than 50%
• D) Can't tell from the information given.

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Definitions:

Prostaglandin

A group of physiologically active lipid compounds having diverse hormone-like effects in animals, such as regulating inflammation, blood flow, and the formation of blood clots.

Terpene

A large class of organic compounds produced primarily by plants and insects, characterized by their multiples of isoprene units.

Triglyceride

A type of fat found in blood, made of three fatty acids attached to a glycerol backbone, stored in adipose tissue.

Lecithin

A fatty substance found in plant and animal tissues, acting as an emulsifier in food products.