For each situation described below identify the population and the sample explain what p and p represent and tell whether it is appropriate to create a one proportion z interval Complete parts a through d below a Police set up an auto checkpoint at which drivers are stopped and their cars inspected for safety problems They find that 20 of the 143 cars stopped have at least one safety violation They want to estimate the percentage of all cars that may be unsafe Identify the population Choose the correct answer below OA All car passengers OB All cars OC Those cars actually stopped at the checkpoint OD The passengers of those cars actually stopped at the checkpoint Identify the sample Choose the correct answer below OA The passengers of those cars actually stopped at the checkpoint OB Those cars actually stopped at the checkpoint OC All cars O D All car passengers What does p represent ntually seen with safety problems