Question

Assume that adults have IQ scores that are normally distributed with a mean of mu equals 105 and a standard deviation sigma equals 20. Find the probability that a randomly selected adult has an IQ less than 129. Click to view page 1 of the table. LOADING... Click to view page 2 of the table. LOADING... The probability that a randomly selected adult has an IQ less than 129 is nothing. ?(Type an integer or decimal rounded to four decimal places as? needed.)

Answer #1

**Solution
:**

**We assume that adults have IQ scores that are normally
distributed with a mean of mu equals 105 and a standard deviation
sigma equals 20. To find the probability that a randomly selected
adult has an IQ less than 129.**

**Thus , we have the information from the data given
:**

**Let
be the IQ scores of the adults. Thus ,
.**

**Here , we are to find : **

**The probability that a randomly selected adult has an IQ
less than 129 = 0.8849..............(Ans)**

** **

Assume that adults have IQ scores that are normally distributed
with a mean of mu equals 105?=105 and a standard deviation sigma
equals 20?=20. Find the probability that a randomly selected adult
has an IQ between 92 and 118.

Assume that adults have IQ scores that are normally distributed
with a mean of mu equals 100 and a standard deviation sigma equals
20. Find the probability that a randomly selected adult has an IQ
between 85 and 115. The probability that a randomly selected adult
has an IQ between 85 and 115 is:

Assume that adults have IQ scores that are normally distributed
with a mean of 99.9 and a standard deviation of 15.5. Find the
probability that a randomly selected adult has an IQ greater than
125.3. (Hint: Draw a graph.)
The probability that a randomly selected adult from this group has
an IQ greater than 125.3 is
nothing.
(Round to four decimal places as needed.)

Assume that adults have IQ scores that are normally distributed
with a mean 105 and standard deviation of 20. a. Find the
probability that a randomly selected adult has an IQ less than 120.
b. Find P90 , which is the IQ score separating the bottom 90% from
the top 10%. show work

Assume that adults have IQ scores that are normally distributed
with a mean of 100 and a standard deviation of 15. For a randomly
selected adult, find the probability. Round scores to nearest whole
number.
1.) Prob. of IQ less than 85
2.)Prob. of IQ greater than 70
3.) Prob. of randomly selected adult having IQ between 90 and
110.

Assume that adults have IQ scores that are normally distributed
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with a mean of u=97.4 and a standard deviation of o=23.8. Find the
probability that a randomly selected adult has an IQ less than
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greater than 132.7 is ?

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Assume that adults have IQ scores that are normally distributed
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with a mean of 101.9 and a standard deviation of 23.9.
Find the probability that a randomly selected adult has an IQ
greater than 149.6
(Hint: Draw a graph.) (Round to four decimal places as
needed.)

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