Answered: on a planet far far away from Earth,…

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

on a planet far far away from Earth, the IQ of the ruling species is normally distributed with a mean of 114 and a standard deviation of 14. Suppose one individual is randomly chosen. Let X=IQ of an individual.

A) find the probability that a randomly selected person's IQ is over 104. Round your answer to 4 decimal places.

b) A school offers special services for all children in the bottom 4% for IQ scores. what is the highest IQ score a child can have and still receive special services?. round your answer to 2 decimal places.

C) Find the Inter Quartile Range (IQR) for IQ scores. Round your answer to 2 decimal places.

Q1:

Q3:

IQR:

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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