The mean of 50 observations was 250.later it was found out that the number 152 was wrongly copied as 102 for the computation of means .find the correct mean.
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Answered by
124
hello Frnd
Here is your answer
Given as
No. of observation N = 50
Incorrect Mean = 250
Right item = 152
Wrong item = 102
As we know that
Mean = Sum of observation ( X )/ No. of observation
250 = X /50
X = 12,500
Hence sum of observation is 12,500
Now
Correct sum of observation = 12500 - Wrong item + Correct item
= 12500 - 102 + 152
= 12, 550
Now correct Mean
Mean = 12550/ 50
= 251
Hence the correct Mean = 251
hope it helps
jerri
Here is your answer
Given as
No. of observation N = 50
Incorrect Mean = 250
Right item = 152
Wrong item = 102
As we know that
Mean = Sum of observation ( X )/ No. of observation
250 = X /50
X = 12,500
Hence sum of observation is 12,500
Now
Correct sum of observation = 12500 - Wrong item + Correct item
= 12500 - 102 + 152
= 12, 550
Now correct Mean
Mean = 12550/ 50
= 251
Hence the correct Mean = 251
hope it helps
jerri
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Answered by
5
Step-by-step explanation:
answer is 251
hopes it helps you
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