The mean IQ of 500 data science students is 151 and the standard deviation is 15. Assuming that the IQ scores are normally distributed, find how many students whose IQ is between 120 and 155. Use the normal distribution table

The mean IQ of 500 data science students is 151 and the standard deviation is 15. Assuming that the IQ scores are normally distributed, find how many students whose IQ is between 120 and 155. Use the normal distribution table

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.4: Distributions Of Data

Problem 22PFA

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Question

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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