How to select mean and standard deviation for probability density function ?

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Saurabh Verma
Saurabh Verma 2022-4-13
回答： TARUN 2025-5-28
Actually, I am trying to plot probability density function but bit of confused in the process of selection of mean and standard deviation values. I have seen some examples and found they have been selcted ramdomly. So, I just wanted to know the selection process is random or there is any spacific method.

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回答（1 个）

TARUN
TARUN 2025-5-28
Hi @Saurabh Verma,
The selection of mean and standard deviation when plotting a Probability Density Function (PDF) is not random if you’re working with actual data.
Feel free to go through the following documentations to calculate mean and standard deviation for your data:
Mean: https://www.mathworks.com/help/matlab/ref/double.mean.html
Standard Deviation: https://www.mathworks.com/help/matlab/ref/double.std.html
If you're not working with actual data, it's appropriate to use reliable estimates for the mean and standard deviation.
For example, the average human body temperature is around 98.6°F (37°C) with a standard deviation of about 0.7°F, based on clinical research. Using such established values helps create a realistic and meaningful probability density function.

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