According to a survey of 320 BZU students who drive, 40 students have been
involved in some type of car accident (minor to major). Construct a 99% Confidence
Interval for the true proportion of BZU students that drive who have been involved in
some type of car accident (minor to major).
-3. A survey organization would like to estimate a population percentage in a large
population to an accuracy of 15 percentage points with 95% confidence. They have no
current knowledge of the size of the population percentage. How large should a
random sample be selected to achieve their goal for the margin of sampling error?
4. A survey of 16 doctors selected at random revealed that the average annual
consumption of aspirin tablets per doctor was 100 with a standard deviation of 32.
Establish 95% confidence limits for the average annual consumption of aspirin tablets
of all doctors. (Assume that the population is normal).
