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152. The mean of a certaincertain number ofobservations is 35. What is the new value ofthe mean if each observation is :(i) increased by 7. (ii) decreased by 5.(iii) multiplied by 2. (iv) divided by 5.(v) increased by 20%.(vi) decreased by 30%. |
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Answer» Answer: MEAN of n observations = 35 Sum of n observations = 35n If each observation is INCREASED by 7 New sum = 35n + 7N = 42n thus, new mean = 42n/n = 42 |
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