Question

Assume that adults have iq scores that are normally distributed, with a mean of 107 and a standard deviation of 15. find the probability that a randomly selected individual has an iq between 75 and 117. choose the correct value:

Answer 1

0.732

Explanation:

`\displaystyle P(75 < X < 117)\\\\=P\biggr((75-107)/(15) < Z < (117-107)/(15)\biggr)\\\\\approx P(-2.13 < Z < 0.67)\\\\\approx0.732`

Consult a z-table to determine this value