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Find the combined standard deviation using the following Information:

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Find the combined standard deviation using the following Information:

Data set A Data set B
No. of observations 50 60
Mean 113 120
Standard deviation 6 7
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Best answer

Here, n1 = 50, x̄1 = 113, s1 = 6
n2 = 60, x̄2 = 120, s2 = 7

Combined mean:

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