The mean of the six observations 5,15,25,35,45,55 is 30. Find its variance
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The mean of the six observation 5,15,25,35,45,55 is 30 find the variances .? ... → variance = sum of (difference)² / number of observation . → variance = 1750 / 6 = 291. 67
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5+15+25+35+45+55+30/7
beacuse mean= t
sum of all observation / no.of observation
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