Find the indicated sample size.The Wechsler IQ test is designed... | Filo

SOLVED:Scores an the Wechsler Adult Intelligence Scale (a standard IQ test) for the 20 to 34 age group are approximately Normally distributed with μ=110 and σ=25 . For each part, follow the four step process. (a) At what percentile is an IQ scare of 150 ? (b) What percent of people aged 20 to 34 have IQ5 between 125 and 150 ? (c) MENSA is an elite organization that admits as members people who score in the top 2 % on 10 tests. What score on the Wechsler Adult Intelligence Scale would an individu

The Wechsler IQ test is designed so that the mean is 100 and the standard deviation is 15 for the population of normal adults. Find the sample size necessary to estimate the mean IQ score of college professors. We want to be 99 % confident that our sample mean is within 4 IQ points of the true mean. The mean for this population is clearly greater than 100 . The standard deviation for this population is less than 15 because it is a group with less variation than a group randomly selected from the