(4) A 95% confidence interval for u2-u1 is:

13. A new drug designed for treatment of hormone secretion problems is tested on laboratory rats with hormone secretion problems. The scientists are concerned that although many of the secretion problems were solved using the drug, there is an undesirable additional outcome of the weight of the laboratory rats- changing after the new drug is tested on them. The weights before the treatment are believed to be Normally distributed with mean pl. The weights after the treatment are also believed to be Normally distributed but with a possibly different mean p2. A random sample of the weights of 100 rats before the treatment was also obtained, and the mean of these 100 weights was f1 = 504.5 grams, while the standard deviation was 51 = 100 grams. A random sample of the weights of 30 different rats after the treatment was also / obtained, and the mean of these 30 weights was f2 = 539.1 grams while the standard deviation was $2: 90 grams. (1) The null and alternate hypotheses are: H0411 = #2; H.411 t' .0: (2) The absolute value of the test statistic is: 1.799 (3)The p-value= 0.08 (4) A 95% condence interval for [.12 H1 is