Question

Suppose that IQ scores have a bell-shaped distribution with a mean of 9595 and a standard deviation of 1818. Using the empirical rule, what percentage of IQ scores are no more than 149149? Please do not round your answer.

Answer #1

Solution :

Given that ,

mean = = 95

standard deviation = = 18

Pr(41X131) = 0.997

The normal distribution is symmetric, then we also conclude that half of that probability (0.003/2 = 0.0015) goes to each of the two tails. This means that

P(X41) = 0.0015

P(X149) = 1−0.0015 = 0.9985

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rule, what percentage of IQ scores are greater than 115? Please do
not round your answer.

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round your answer.

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round your answer.

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round your answer.

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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
64 or greater than 136?
(c) What percentage of people has an IQ score greater
than 136?

Scores of an IQ test have a bell-shaped distribution with a
mean of
100 and a standard deviation of 16.
Use the empirical rule to determine the following. (In the
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(a) What percentage of people have an IQ score between 52 and
148?
%
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(c) What percentage of people have an IQ score greater than
148? %
(d)...

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