Mean of 20 differance observation was found as 65 but later on it was found that 69 was misread as 96 find the correct mean
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Answered by
108
Hi friend
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Your answer
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Mean of 20 observations = 65
Sum of 20 observations = ( 20 × 65) = 1300
Wrong observation = 96
Correct observation = 69
Correct sum of 20 numbers =
Incorrect sum - incorrect observation + correct observation
= 1300 - 96 + 69
= 1273
correct mean = 1273/20 = 63.65
HOPE IT HELPS
---------------
Your answer
--------------------
Mean of 20 observations = 65
Sum of 20 observations = ( 20 × 65) = 1300
Wrong observation = 96
Correct observation = 69
Correct sum of 20 numbers =
Incorrect sum - incorrect observation + correct observation
= 1300 - 96 + 69
= 1273
correct mean = 1273/20 = 63.65
HOPE IT HELPS
Answered by
4
Answer:
Sum of 20 observation = 20× 65 = 1300
after Subtract 96 and add 69, we get
sum of correct 20 observation
=1273 ÷ 20 =63.65
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