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The mean of 25 observations is 9 . If eqch onsevation is increased by 4, then the new mean is |
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Answer» Step-by-step explanation: If each observation is increased by x, the. MEAN also increases by x. Here, each observation is increased by 4. So mean will increase by 4. New mean = 9 + 4 = 13 ______________________ Solution: number of observations = 25 mean = 9 Sum of observations = 25 × 9 = 225 Now, if each observation is increases by 4, increase in sum of observation = 25×4 = 100 New sum = 225 + 100 = 325 new mean = 325/25 = 13 |
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