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Statistics Wording Problem
1. The mean of 10 observations is 12.5 . While calculating the mean one observation was by mistake taken as -8 instead of +8 ...
2. The mean of 10 observations is 35 . While calculating the mean two observations were by mistake taken as 35 instead of ...
3. The mean of 15 observations is 16.4 . If we remove one observation from it then the mean of remaining observations is 17 ...
4. The sum of 15 observation is 343 . If we remove two observation 18 and 26 , then find out the mean of remaining obser ...
5. The mean of 5 observations is 20 . If we add one new observation then the new mean of the observations is 25 . So find o ...
6. The mean of observation is 10 . If we add 2 and then multiply or divide by 3 in each observation, then find the new mean ...
Problem 3 of 6
3. The mean of
observations is
. If we remove one observation from it then the mean of remaining observations is
, then find out the removed observation ?
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Statistics Wording Problem
3. The mean of 15 observations is 16.4 . If we remove one observation from it then the mean of remaining observations is 17 , then find out the removed observation ?
Here Mean
X
`= 16.4` and `n = 15`
`Sigma X =`
X
`× n = 16.4 × 15 = 246`
After removing one observation, the mean of remaining observations is `17`
`:.` the correct sum `Sigma X = 17 × 14 = 238`.
`:.` the removed observation `= 246 - 238 = 8`.
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