Consider the following.
(a) Calculate the estimate for the standard error of difference between two independent means for s12 = 20, s22 = 10, n1 = 11, and n2 = 30. (Give your answer correct to two decimal places.)
(b) Calculate the estimate for the standard error of difference between two independent means for s12 = 0.059, s22 = 0.109, n1 = 15, and n2 = 15. (Give your answer correct to four decimal places.)
(c) Calculate the estimate for the standard error of difference between two independent means for s1 = 3.6, s2 = 6.8, n1 = 17, and n2 = 16. (Give your answer correct to two decimal places.)