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The mean and standard deviation (s.d.) of 10 observations are 20 and 2 respectively. Each of these 10 observations is multiplied by p and then reduced by q, where p≠0 and q≠0. If the new mean and standard deviation become half of their original values, then q is equal to: |
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Answer» The mean and standard deviation (s.d.) of 10 observations are 20 and 2 respectively. Each of these 10 observations is multiplied by p and then reduced by q, where p≠0 and q≠0. If the new mean and standard deviation become half of their original values, then q is equal to: |
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