Drug A was prescribed for a random sample of
12patients complaining of insomnia. An independent random sample of
16patients with the same complaint received drugB.The number of
hours of sleep experienced during the second night after treatment
began were as follows:
A: 3.5, 5.7, 3.4, 6.9, 17.8, 3.8, 3.0, 6.4, 6.8, 3.6, 6.9,
5.7
B: 4.5, 11.7, 10.8, 4.5, 6.3, 3.8, 6.2, 6.6, 7.1, 6.4, 4.5, 5.1,
3.2, 4.7, 4.5, 3.0
Construct a 95 percent confidence interval for the difference...