A statistical analysis of 1000 long-distance telephone calls made from the headquarters of PTCL, indicated that the length of these calls is normally distributed with μ = 240 seconds and σ= 40 seconds Find the proportion of a particular call lasted between 180 and 300 seconds. What is the length of a particular call if 1% of all calls are shorter? Subject: Applied Statistics

The formula for z score is, Here μ is the mean and σ is the standard deviation. The…

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MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

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A statistical analysis of 1000 long-distance telephone calls made from the headquarters of PTCL, indicated that the length of these calls is normally distributed with μ = 240 seconds and σ= 40 seconds
Find the proportion of a particular call lasted between 180 and 300 seconds.
What is the length of a particular call if 1% of all calls are shorter? Subject: Applied Statistics

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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