The weekly television viewing time of children aged 2 – 11 years is normally distributed with a mean of 24.50 hours and a standard deviation of 6.23 hours.a) What percentage of children watch more than 34 hours of television per week? b) What percentage of children watch between 10 and 20 hours of television per week? c) Determine the 25th percentile of the distribution of weekly television viewing time for children aged 2 – 11 years.

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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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The weekly television viewing time of children aged 2 – 11 years is normally distributed with a mean of 24.50 hours and a standard deviation of 6.23 hours.

a) What percentage of children watch more than 34 hours of television per week?

b) What percentage of children watch between 10 and 20 hours of television per week?

c) Determine the 25th percentile of the distribution of weekly television viewing time for children aged 2 – 11 years.

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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