Solved: Testing Claims about Variation. In Exercises 516,

Chapter 8, Problem 16

(choose chapter or problem)

Testing Claims about Variation. In Exercises 516, test the given claim. Identifythe null hypothesis, alternative hypothesis, test statistic, P-value or critical value(s),conclusion about the null hypothesis, and final conclusion that addresses the originalclaim. Assume that a simple random sample is selected from a normally distributedpopulation. IQ of Professional Pilots The Wechsler IQ test is designed so that the mean is 100 andthe standard deviation is 15 for the population of normal adults. Listed below are IQ scores ofrandomly selected professional pilots. It is claimed that because professional pilots are a morehomogeneous group than the general population, they have IQ scores with a standard deviationless than 15. Test that claim using a 0.05 significance level.121 116 115 121 116 107 127 98 116 101 130 114