Answer to Question #53657 in Statistics and Probability for christine

Question

the wechsler IQ is designed so that the means is 100 and the standard deviation is 15 for the population of normal adults. listed below are IQ scores for professional pilots. it is claimed that because professional pilots are a more homogeneous group than the general population, they have IQ scores with a standard deviation less than 15. test that claim using a .05 significance level. 121 116 115 121 116 107 127 98 116 101 130 114