Consider the following.
(a) Calculate the estimate for the standard error of difference between two independent means for s12 = 12, s22 = 17, n1 = 14, and n2 = 23. (Give your answer correct to two decimal places.)
(b) Calculate the estimate for the standard error of difference between two independent means for s12 = 0.046, s22 = 0.101, n1 = 13, and n2 = 8. (Give your answer correct to four decimal places.)
(c) Calculate the estimate for the standard error of difference between two independent means for s1 = 3.3, s2 = 5.9, n1 = 28, and n2 = 15. (Give your answer correct to two decimal places.)