Arithmetic mean of 9 observations is calculated as 38 but in doing so an observation 27 is mistaken for 72actual mean of the data
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1
Given,
arithmetic mean of 9 observations is = 38
72-27=45
now add 45 to the sum
x+45/9=38
x+45=342
x=342-45
x=297
now actual mean of the data is = 297/9
=33
Actual mean of the data is 33
arithmetic mean of 9 observations is = 38
72-27=45
now add 45 to the sum
x+45/9=38
x+45=342
x=342-45
x=297
now actual mean of the data is = 297/9
=33
Actual mean of the data is 33
Answered by
2
Answer:
hey!!
Step-by-step explanation:
mean=sum of observations/ total observations
38=sum/9
38×9=sum
342=sum
If a number is mistakenly written as 72 then 45 should be added to the sum
sum=342
actual sum should be :
342+45
=387
mean=sum/total observations
=387/9
= 43
:)
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