1.

Find the mean and variance for the following frequency distribution Classes0−3030−6060−9090−120120−150150−180180−210Frequency23510352 Or The mean and standard deviation of six observations are 8 and 4, respectively. If each observation is multiplied by 3, find the mean and new standard deviation of the resulting observations.

Answer»

Find the mean and variance for the following frequency distribution

Classes0303060609090120120150150180180210Frequency23510352

Or

The mean and standard deviation of six observations are 8 and 4, respectively. If each observation is multiplied by 3, find the mean and new standard deviation of the resulting observations.



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