Scores on the Wechsler Adult intelligence Scale(a Standard IQ test) for a certain age group are normally distributed with mean µ = 100 and standard deviation σ = 15. a. What percent of IQ scores are less than 122? b. What is the probability that a randomly selected adult in this age group has an IQ score higher than 147? Is this a significant/unusual event? Explain. c. What percent of adults in this age group have IQs between 85 and 100? Is this significant/unusual event? Explain.

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.