Let X have a normal distribution with mean = 20 and standard deviation = 4. Determine the area in the normal curve for which:

P(X > 28) (2.5 pts) P(X < 12) (2.5 pts) P(16 < X < 24) (2.5 pts)

The IQ scores of students listed below are from a SAMPLE of MATH 300 class.

IQ Scores 92 110 105 96 120 100 90 98 110 95 102 99 93 119 106 103 91 101 97 105

What is the mean IQ score? Round to the nearest whole number. (2.5 pts) Compute the IQ scores within plus/minus one standard deviation? Two answers. Round to the nearest whole numbers. (2.5 pts) Compute the IQ scores within plus/minus two standard deviation? Two answers. (2.5 pts)