the mean of 15 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
Answers
Answered by
2
Answer:
MEAN OF 50 OBSERVATION = 250
IT FOUND THE NO. 152 IS COPIED 102
S0, 152-102 ==> 50
SO, MEAN OF 50 OBSERVATION = 250+50 ==> 300
thameshwarp9oqwi:
SRY ITS WRONG
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
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
Similar questions