In a study about viral fever, the number of people affected in a town were noted as

Find its standard deviation.

X ~ B(400, 1//5) then find its standard deviation

The measurements of the diameters (in cm) of the plates prepared in a factory are given below. Find its standard deviation.

The following data is about the number of days patient stayed in a hospital after an operation. Calculate the standard deviation for this distribution.

If n = 15, bar x = 10 and Sigmax^2 = 1530 then find its standard deviation.

If the mean of a binomial distribution is 20 and its standard deviation is 4, find p .

The rainfall recorded in various places of five districts in a week are given below. Find its standard deviation.

In the study of 79 diabetic patients, the following data are obtained. Find the variance and the standard deviation without finding the average (i.e. using deviation method).