Answered: Based on data from a college, scores…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

Based on data from a college, scores on a certain test are normally distributed with a mean of

1545

and a standard deviation of

318.

Complete parts (a) through (c) below.

a. Find the percentage of scores greater than

1640.

38.21%

(Round to two decimal places as needed.)

b. Find the percentage of scores less than

1132.

9.68%

(Round to two decimal places as needed.)

c. Find the percentage of scores between

1291

and

1609.

Whats the %

(Round to two decimal places as needed.)

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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