mean of 36 observations is 12.one observation 47 was misread as 74. find the correct mean
Answers
Answered by
2
Heya !!
Calculated mean of 36 observations = 12
Incorrect sum of these 36 observations = ( 12 × 36 ) = 432.
Correct sum of these observations = ( Incorrect sum ) - (. Wrongly copied observation ) + ( Actual observation )
=> 432 - 74 + 47
=> 358 + 47
=> 405
Hence,
The correct mean is 405.
Calculated mean of 36 observations = 12
Incorrect sum of these 36 observations = ( 12 × 36 ) = 432.
Correct sum of these observations = ( Incorrect sum ) - (. Wrongly copied observation ) + ( Actual observation )
=> 432 - 74 + 47
=> 358 + 47
=> 405
Hence,
The correct mean is 405.
Similar questions