IQ scores are standardized to produce a normal distribution with a mean of µ = 100 and a standard deviation of σ = 15. Find the proportion of the population in the following IQ category: Genius or near genius: IQ greater than 140.

Explanation:

First let's note* the given values:

Ζ = Χ - μ / σ

μ = 100;

σ = 15

Converting z score to a decimal P using the percentage-finding method you want.

a. Genius or near genius: IQ over 140  

z > 40 / 15 = 2.6667 P(z > 2.6667) = .0038  3.8% of whole the population

the economic difference between the three colonial regions. shipbuilding, whaling, fishing, and trapping where also main factors to the economy. the southern regional colonies economy was based on sugarcane, rice, cotton, tobacco, and indigo.

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