b) between 4.35 and 4.85 inches in length? 3) In a sample of 40 adults, the average number of seconds it took to open a temper-resistant aspirin bottle was = 20.6 seconds and s = 5.71 seconds. Construct a 95 percent confidence interval for the mean, , number of seconds it takes to open the aspirin bottle. 4) According to the Bureau of the Census, the mean annual income of government employees is $35,000. There is some doubt that this mean is representative of incomes of government employees