Question

the mean of 25 observation is 30 in which two observation is misread 13 and 15 as 23 and 14 .then find the correct mean.​

Answer 1

Answer:

29.64

Step-by-step explanation:

mean =30

2 observations misread

23+14-(13+15) = 9

sum of observations should be reduced by 9

so mean should be reduced by 9/25= 0.36

30-.3 =29.64

or

sum of 25observations = 750

sum of original 25 observations

= 750-9 =741

mean= 741/25 =29.64