Answered: times are normally distributed with a…

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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A random sample of 10 university students was surveyed to determine the amount of time spent weekly using a personal computer. The times are:

13 14 5 6 8 10 7 12 15 3

If the times are normally distributed with a sample standard deviation of 4.11 hours, estimate with 90% confidence the mean weekly time spent using a personal computer by all university students.

How do you calculate nd get to these answers?

What is the confidence iterval in percentage?

what is the Left critical Value and the Right critical value?

what is the upper critical value and the lower critical 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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