A pharmaceutical company makes tranquilizers.
It is assumed that the distribution for the length of time they last is approximately normal. Researchers in a hospital used the drug on a random sample of 9 patients.
The effective period of the tranquilizer for each patient (in hours) was as follows: 2.5; 2.9; 3.0; 2.3; 2.3; 2.2; 2.8; 2.1; and 2.4.NOTE:
If you are using a Student’s t-distribution, you may assume that the underlying population is normally distributed.
(In general, you must first prove that assumption, though.)
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