Scores of an IQ test have a bell-shaped distribution with a mean of 100 and a standard deviation of 18. Use the empirical rule to
determine the following.
(a) What percentage of people has an IQ score between 64 and
136?
(b) What percentage of people has an IQ score less than 82 or
greater than 118?
(c) What percentage has an IQ greater than 136?

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step-by-step explanation:

step-by-step explanation:

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step-by-step explanation:

let

we know that

the y-intercept is the y-coordinate of the point when the value of x is equal to zero

so

the y-coordinate of the point a is the y-intercept

the answer part a) is

the value of y-intercept is

part b) find the slope m

we know that

the value of the slope is equal to

substitute the values

therefore

the answer part b) is

the value of the slope is equal to

the general answer is

the slope is

the value of y-intercept is