Scores on a certain intelligence test for children between ages 13 and 15 years are approximately normally distributed with μ=106 and σ=18. (a) What proportion of children aged 13 to 15 years old have scores on this test above 88? (NOTE: Please enteryour answer in decimal form. For example, 45.23% should be entered as 0.4523.)Answer:…●●●(b) Enter the score which marks the lowest 25 percent of the distribution.Answer:(c) Enter the score which marks the highest 10 percent of the distribution.Answer:

The population mean is 106 and population standard deviation is 18.

Answered: (a) What proportion of children aged 13…

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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Scores on a certain intelligence test for children between ages 13 and 15 years are approximately normally distributed with μ=106 and σ=18.

(a) What proportion of children aged 13 to 15 years old have scores on this test above 88? (NOTE: Please enter
your answer in decimal form. For example, 45.23% should be entered as 0.4523.)
Answer:
…
●●●
(b) Enter the score which marks the lowest 25 percent of the distribution.
Answer:
(c) Enter the score which marks the highest 10 percent of the distribution.
Answer:

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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