<prompt> While calculating the incubation period for measles in a group of 25 children, deviation is 2 and the mean incubation period is 8 days. Calculate the standard error -0.410.52  <response>: STANDARD ERROR OF MEAN SEMEANSEmean is the measure of difference between sample and population values: Whatever be the sampling procedure or the care taken while selecting sample, the sample estimates statistics will differ from population values parametersSE is a measure of chance variation, and IT DOESNOT mean an error or mistake. 