Insurance Companies Assignment
February 18th, 2020
Suppose that insurance companies did a survey. They randomly surveyed 450 drivers and found that 300 claimed they always buckle up. We are interested in the population proportion of drivers who claim they always buckle up.
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.)
- (i) Enter an exact number as an integer, fraction, or decimal.
- x = ______
- (ii) Enter an exact number as an integer, fraction, or decimal.
- n = ______
- (iii) Round your answer to four decimal places.
- p’ = ______(rounded to four decimal places)
State the confidence interval. (Round your answers to four decimal places.)
(______ , ______)