Answered: A Poll of 1138 teens aged 13 to 17…

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

A Poll of 1138 teens aged 13 to 17 showed that 57% of them have made new friends online. Use a significance level of 0.01 to test the claim that half of all teens have made new friends online. Use P-value method. Use the normal distribution as an approximation to the binomial distribution

identify the test statistic

identify the P-value

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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