1.

8 Mean of 15 observations is 200 If one observationexcluded, their mean is 198. Find the excludedobservation

Answer»

x1+x2+....x15/15=200x1+x2+..+x14+x15=200*15x1+x2+...+x14/14=198x1+x2...+x14=198*14henceput this in equation 1198*14+x15=200*15x15=200*15-198*14=3000-2772=228hence excluded observation is 228



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