mean of 100 observation is 45.it was later found that two observation 19&31were recorded incorrectly as 91&13 then the correct mean is
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It was later found that two observations 19 and 31 were incorrectly recorded as 91 and 13. The correct mean is: A) 44.0.
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Answer:
Mean = 45
100
x
=45⇒x=4500
Two number (91+13)=104 incorrect
So let sum = 4500 – 104 = 4396
Add correct number 19+31 = 50
= 4396+50 = 4446
Mean =
100
4446
=44.46
Step-by-step explanation:
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