Question

Twenty laboratory mice were randomly divided into two groups of 10. Each group was fed according to a prescribed diet. At the end of 3 weeks, the weight gained by each animal was recorded. Do the data in the following table justify the conclusion that the mean weight gained on diet B was greater than the mean weight gained on diet A, at the α = 0.05 level of significance? Assume normality. (Use Diet B - Diet A.)

Diet A 9 8 8 5 9 11 13 13 7 12

Diet B 18 17 10 15 20 7 13 21 21 13

i) Find t. (Give your answer correct to two decimal places.)

(ii) Find the p-value. (Give your answer correct to four decimal places.)

Answer 1

Piet B (x)] 18 17 10 Diet A 14 9 8 8 de x-y 9 9 2 15 20 7 13 21 21 13 5 9 11 13 13 7 12 10 11 -4 0 8 14 n=10, 226, She 5.8119. - tot el d=0, o Mdo. & p-value = 1000099]