Home
Class 12
MATHS
For a group of 200 candidates the mean ...

For a group of 200 candidates the mean and standard deviation were found to be 40 and 15 repectively . Later on it was found that the score 43 was misread as 34. Find the correct mean and standard deviation.

Promotional Banner

Similar Questions

Explore conceptually related problems

For a group of 200 candidates the mean and S.D. were found to be 40 and 15 respectively. Later on it was found that the score 43 was misread as 34. Find the correct mean and correct S.D.

The mean and standard deviation of 18 observations are found to be 7 and 4 respectively. On rechecking it was found that an observation 12 was misread as 21. Calculate the correct mean and standard deviation.

The mean and standard deviation of 10 items were found to be 17 and sqrt(33) . Later it was detected that an item was tekn wrongly as 26 in place of 12. Find the correct mean and standard deviation.

The mean and standard deviation of a group of 100 observations were found to be 20 and 3 respectively. Later on it was found that three observations were incorrect , which were recorded as 21, 21 and 18 . Find the mean and standard deviation if the incorrect observations are omitted.

The mean and standard deviation of a group of 100 observations were found to be 20 and 3, respectively. Later on it was found that three observations were incorrect, which are recorded as 21, 21 and 18. Find the mean and standard deviation if the incorrect observations are omitted.

Find the mean and standard deviation from the following data :

The mean of marks scored by 100 students was found to be 40. Later on it was discovered that a score of 53 was misread as 83. Find the correct mean.

The mean of marks scored by 100 students was found to be 40. Later on it was discovered that a score of 53 was misread as 83. Find the correct mean.

The mean and standard deviation of agroup of 100 observations were found to be 20 and 3 respectively .Later , it was found that three observations were incorrect , which were recorded as 21 , 21 and 18 . Find the mean and standard deviation if the correct observations are omitted.

Find the mean and standard deviation using short cut method