Police set up an auto checkpoint at which drivers are stopped and their cars are inspected for safety problems. They find that 25 of the 250 vehicles stopped have at least one safety violation.
a) Find a 98% confidence interval for the proportion of drivers in the county that have vehicles with at least one safety violation. Do not make these calculations by hand. Instead, use the 1-PropZInt command in your graphing calculator found under STAT – TESTS. Write out what you entered in your calculator.
b) Use your interval to find the margin of error associated with this confidence interval.
c) Interpret your interval above in the context of this problem.
We need at least 10 more requests to produce the answer.
0 / 10 have requested this problem solution
The more requests, the faster the answer.
Police set up an auto checkpoint at which drivers are stopped and their cars are inspected for safety problems. They find that 25 of the 250 vehicles stopped have at least one safety violation. a) Find a 98% confidence interval for the proportion of
Certain states require your vehicle to be inspected for safety on a yearly basis. Police randomly stop drivers from time to time to ensure that the car's safety inspection is up to date. Last year, an average of 10% of cars stopped were ticketed for having expired stickers. The state then funded a marketing campaign to increase awareness of the safety inspection requirement in hopes of lowering the amount of tickets issued. Last month the police issued tickets for expired...