the mean of 40 observations is 28.it was found later that an observation 52 was wrongly taken the correct new men is
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9
Answer:
mean=28
observations=40
sum of observation=40×28=1120
52 is wrongly taken
so the corrected sum of observation=1120-52=1068
correct new mean=1068/39=27.38
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16
Answer:
New mean = 28.75
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