If z is a standard normal variable, find the probability. The probability that z lies between -0.55 and 0.55

If z is a standard normal variable, find the probability. The probability that z lies between -1.10 and -0.36

Solve the problem. Round to the nearest tenth unless indicated otherwise. A bank's loan officer rates applicants for credit. The ratings are normally distributed with a mean of 200 and a standard deviation of 50. Find P 60, the score which separates the lower 60% from the top 40%.

Provide an appropriate response. Assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard deviation of 15 (as on the Wechsler test). Find the probability that a randomly selected adult has an IQ between 90 and 120 (somewhere in the range of normal to bright normal).

Solve the problem. Round to the nearest tenth unless indicated otherwise. Assume that women have heights that are normally distributed with a mean of 63.6 inches and a standard deviation of 2.5 inches. Find the value of the quartile Q 3.

Provide an appropriate response. Assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard deviation of 15 (as on the Wechsler test). Find P 30, which is the IQ score separating the bottom 30% from the top 70%.