Exercise 1 IQ scores are known to be approximately normally distributed, with a mean of 100 and a standard deviation of 15. a) What proportion of the population will have an IQ below 80? b) What proportion of the population will have an IQ below 110? c) What proportion of the population will have an IQ between 110 and 115? d) What score will the top 10% of the population have an IQ greater than? (to one decimal place, find the closest Z value in the table).
Exercise 1 IQ scores are known to be approximately normally distributed, with a mean of 100 and a standard deviation of 15. a) What proportion of the population will have an IQ below 80? b) What proportion of the population will have an IQ below 110? c) What proportion of the population will have an IQ between 110 and 115? d) What score will the top 10% of the population have an IQ greater than? (to one decimal place, find the closest Z value in the table).
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Question
Exercise 1
IQ scores are known to be approximately
a) What proportion of the population will have an IQ below 80?
b) What proportion of the population will have an IQ below 110?
c) What proportion of the population will have an IQ between 110 and 115?
d) What score will the top 10% of the population have an IQ greater than? (to one decimal place,
find the closest Z value in the table).
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