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How to find standard deviation in python without inbuilt function

User CSharpAtl
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Final answer:

To find the standard deviation in Python without an inbuilt function, calculate the mean of the dataset, find the squared differences from the mean, average those, and then take the square root to find the standard deviation.

Step-by-step explanation:

To calculate the standard deviation in Python without using an inbuilt function, you can follow these steps:

  • Compute the mean (average) of the data set.
  • Subtract the mean from each data point and square the result (this is the squared difference).
  • Find the average of these squared differences (this is the variance).
  • Take the square root of the variance, which gives you the standard deviation.

Here's a simple code snippet in Python to illustrate this:

data = [4, 8, 6, 5, 3, 2]
mean = sum(data) / len(data)
variance = sum((x - mean) ** 2 for x in data) / len(data)
standard_deviation = variance ** 0.5
print(standard_deviation)

Following this method allows you to calculate the standard deviation without relying on libraries like NumPy or functions like statistics.stdev().

User Artem Ilchenko
by
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