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Calculate the variance & standard deviation for the following raw data. 80 + 82 + 73.5 + 87 + 92.5 + 93 + 90 +

Calculate the variance & standard deviation for the following raw data. 80 + 82 + 73.5 + 87 + 92.5 + 93 + 90 + 82 + 82 + 57 + 48 + 48 + 57 + 48 + 47 + 50.5 + 53 + 49+ 48.5 + 46.5

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