Question

1A) An experiment was designed to estimate the mean difference in weight gain for pigs fed ration A as compared with those fed ration B. Eight pairs of pigs were used. The pigs within each pair were litter-mates. The rations were assigned at random to the two animals within each pair. The gains (in pounds) after 45 days are shown in the following table. Assuming weight gain is normal, find the 99% confidence interval estimate for the mean of the differences μ_d, where d = ration A - ration B. (Give your answers correct to two decimal places.)

Litter	1	2	3	4	5	6	7	8
Ration A	62	61	43	64	46	41	53	55
Ration B	55	53	41	55	43	31	46	47

Lower Limit -

Upper Limit -

1B) Find the value of z that would be used to test the difference between the proportions, given the following. (Use G - H. Give your answer correct to two decimal places.)

Sample	n	x
G	371	321
H	427	338

Answer 1