Question
In: Statistics and Probability
Assume that adults have IQ scores that are normally distributed with a mean of 95.8 and...
Assume that adults have IQ scores that are normally distributed with a mean of 95.8 and a standard deviation of 22.4. Find the probability that a randomly selected adult has an IQ greater than 127.6. (Hint: Draw a graph.) The probability that a randomly selected adult from this group has an IQ greater than 127.6 is nothing. (Round to four decimal places as needed.)
Solutions
Expert Solution
Since the distribution is normal hence Z score is applicable for probability calculation as
P(X>127.6)
Z score at X=127.6
Hence P(X>127.6) =P(Z>1.42) is computed using Z table shown below as
=0.0778
orchestra answered 1 year agoRelated Solutions
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