34 lines
665 B
Python
34 lines
665 B
Python
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import math
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import sys
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def sd_calc(data):
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n = len(data)
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if n <= 1:
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return 0.0
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mean, sd = avg_calc(data), 0.0
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# calculate stan. dev.
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for el in data:
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sd += (float(el) - mean)**2
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sd = math.sqrt(sd / float(n-1))
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return sd
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def avg_calc(ls):
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n, mean = len(ls), 0.0
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if n <= 1:
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return ls[0]
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# calculate average
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for el in ls:
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mean = mean + float(el)
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mean = mean / float(n)
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return mean
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data = [4, 2, 5, 8, 6]
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print("Sample Data: ",data)
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print("Standard Deviation : ",sd_calc(data))
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