Question

The mean of 40 observations is 58 .Later on it found that the observation 54 was misread as 45 .Find the correct mean

Answer 1

Answer:

58.225

Step-by-step explanation:

mean of 40 observations=58

so sum of observations=58*40=2320

now 45 was wrong and correct was 54

so sum of observations=2320-45+54=2329

so actual mean=2329/40

=58.225