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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 . F ...
2. The mean of 10 observations is 35 . While calculating the mean two observations were by mistake taken as 35 instead of 25 and ...
3. The mean of 15 observations is 16.4 . If we remove one observation from it then the mean of remaining observations is 17 , th ...
4. The sum of 15 observation is 343 . If we remove two observation 18 and 26 , then find out the mean of remaining observations.
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 out ne ...
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 2 of 6
2. The mean of
observations is
. While calculating the mean two observations were by mistake taken as
instead of
and
instead of
. Find the correct mean.
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Statistics Wording Problem
2. The mean of 10 observations is 35 . While calculating the mean two observations were by mistake taken as 35 instead of 25 and 30 instead of 45 . Find the correct mean.
Here Mean
X
`= 35` and `n = 10`
`Sigma X =`
X
`× n = 35 × 10 = 350`
`:.` the correct sum `Sigma X = 350 - 35 + 25 - 30 + 45 = 355`.
`:.` `text{correct mean} = text{correct sum}/n = 355/10 = 35.5` .
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