the mean of 10 items was 50. the value of largest item was 65. it was later found that it is actually 60.therefore the correct mean is....
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Step-by-step explanation:
The mean and median of 100 items are 50 & 52
respectively. The value of the largest items
is 100. It was later found that it is 110.
The true mean and median are ________
Sol we know that Arithmetic mean =∑X/N
Given Mean =50
N=100
i.e, 50=
100
∑X
∑X=5000
Later found that it is 110
So the 100 items is wrong value
correct A.M = [∑X (wrong) + correct value of observation −
Incorrect value of observation]/N
correct Mean =[5000+110−100]/100
=[5110−100]/100
=
100
5010
=50.10
∴ The real or true mean value is 50.10
Median value is 52
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