A feeding test is conducted on a heard of 60 dairy cows to compare two diets A sample of 30 cows randomly selected from the herd are fed diet A and the remaining cows are fed with diet B. From observations made over a three-week period, the average dairy milk production (in L) is recorded for each cow and the summary is below:

n Diet A 30 45.9 6.3 Diet B 30 41.3 8.7 Use the evidence and a 0.05 significance level to determine if the average production form the two diets are significantly different Hill = 30 Ho:HA = HB D. HANA $ 18 Ho: HA = HB " HA:# # 30 B. HA:HA > HB A. HA:HA