show probabilities (-inf+inf, -3dev-3dev and so on....)
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Amer Al-Maashani
on 28 Jan 2021
Edited: James Tursa
on 28 Jan 2021
show probabilities (-inf+inf, -3dev-3dev and so on....)
>> mu = 12.5;
sigma = 3.75;
xs = [0:.01:25];
ys = normpdf(xs, mu, sigma);
clf;
plot(xs, ys);
Follow with the mean and std
9 Comments
James Tursa
on 28 Jan 2021
"show probabilities (-inf+inf, -3dev-3dev and so on....)"
I have no idea what is being asked for here. Cumulative probability between the two values? Or ...?
Accepted Answer
James Tursa
on 28 Jan 2021
Edited: James Tursa
on 28 Jan 2021
"Integrating pdf" and "probability ... in given level ranges" sounds like the teacher wants you to use the cdf to get the cumulative probability between a range of values. E.g., maybe this is what is being asked:
>> mu = 12.5;
>> sigma = 3.75;
>> pd = makedist('Normal','mu',mu,'sigma',sigma); % Make a Normal pdf
>> cdf(pd,inf) - cdf(pd,-inf) % the integrated probablility between -inf and +inf
ans =
1
>> cdf(pd,mu+3*sigma) - cdf(pd,mu-3*sigma) % the integrated probablity between mu-3sigma and mu+3sigma
ans =
0.9973
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