Question

A pharmaceutical company makes a pill intended to reduce the chances of seizures

            among children. The pill is supposed to contain 20.0 mg of Phenobarbital. A simple

            random sample of 20 pills yielded the amounts listed here. Does this sample provide

            evidence that the mean amount of Phenobarbital is different than 20.0 mg? Use a 1%

            significance level.

27.5     26.0     22.9     23.4     23.0     23.9     32.6     20.9     22.9      24.3 24.8     16.1     24.3     17.3     18.9     20.7     33.0     15.6     24.3            23.3

Answer 1