Find the mean of the following data, using direct method:
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The mean and variance of eight observation are 9 and 9.25, respectively. If six of the observation are 6,7,10,12,12 and 13, find the remaining two observations.
Find the median of the following data by making a less than given:-
Find the mean and variance for the data 6,7,10,12,13,4,8,12
The mean and the SD of 1,2,3,4,5,6 are
The average marks of boys in a class is 52 and that of girls is 42. The average marks of boys and girls combined is 50. The percentage of boys in the class is
The mean of the data set comprising of 16 observations is 16. If one of the observation valued 16 is deleted and three new observations valued 3, 4 and 5 are added to the data, then the mean of the resultant data, is
The standard deviation of some temperature data in .∘C is 5. If the data were converted into .∘F, the new variance would be
The mean and standard deviation of 20 observations are found to be 10 and 2, respectively. One rechecking, it was found that an observation 8 was incorrect. Calculate the correct mean and standard deviation in each of the following cases. (i) If wrong item is omitted(ii) If it is replaced by 12.