PSY 520 Topic 2 Exercises

PSY 520 Topic 2 Exercises Chapter 5 5.11 Scores on the Wechsler Adult Intelligence Scale (WAIS) approximate a normal curve with a mean of 100 and a standard deviation on 15. What proportion of the IQ scores are a. above Kristen’s 125? z= 125-100/15= 1.67 using the z table on page 536 = 0.0475 b. below 82? z=82-100/15 = -1.2 C’=0.1151 c. Within 9 points of the mean? 100 +9=/15=0.6 100-9=91 91-100/15=-0.6 B+B’ .2257+.2257 =0.4514 d. More than 40 points from the mean? 100+40=/15=2.67 100-40=60 60-100/15=-2.67 C+C’ .0038+.0038 =0.0076 5.13 IQ scores on the WAIS test approximate a normal curve with a mean of 100 and a standard deviation of 15. What IQ score is identified with a. the upper 2 percent, that is, 2 percent to the