the mean of 13 observation of a data is 19. if two observation are mistaken to be 14 each instead of 11 and 17, then find the correct mean
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247
Step-by-step explanation:
total mean 13 ×19 =247
(the original should be added and mistaken should be subtracted )
so; 247- 11-17 +14 +14
= 247-28+28
=247
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