A sample of 1000 students whose mean weight is 119 lbs (pounds) from a

1.	A sample of 1000 students whose mean weight is 119 lbs (pounds) from a school in Tamil Nadu State was taken and their average weight was found to be 120 lbs with a standard deviation of 30 lbs. Calculate the standard error of the mean.
Answer» Given n = 1000, \(\overline{X}\)= 119, σ = 30 S.E = σ/√n = 30/√1000 = 30/31.623 = 0.9487

A sample of 1000 students whose mean weight is 119 lbs (pounds) from a school in Tamil Nadu State was taken and their average weight was found to be 120 lbs with a standard deviation of 30 lbs. Calculate the standard error of the mean.

Answer»

Given n = 1000, \(\overline{X}\)= 119, σ = 30

S.E = σ/√n

= 30/√1000

= 30/31.623 = 0.9487