PROBLEM VIThe time taken, T seconds, to open a graphics programme on a computer is normally distributed with mean20 and standard deviation σ.Given that P(T> 13/7 <27) = 0.8, find the value of:(a) the standard deviation, o(b) the value of k for which P(T> k) = 0.75.

To solve this problem, we need to use the given information about the normal distribution of the…

Answered: PROBLEM VI The time taken, T seconds,…

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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Estimate the absolute deviation and the coefficient of variation for the results of thefollowing calculations. Round each result so that it contains only significant digits. Thenumbers in parentheses are absolute standard deviations.
what I have is working for other problems but not this one. apparently my standard deviation is off somehow following formulas I have in: standard deviation=SQRT(SUM(F77:F83)/(117-1))
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please help me solve this practice question using excel

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PROBLEM VI The time taken, T seconds, to open a graphics programme on a computer is normally distributed with mean 20 and standard deviation σ. Given that P(T> 13/7 <27) = 0.8, find the value of: (a) the standard deviation, o (b) the value of k for which P(T> k) = 0.75.