Solve to predict the number of people out of 500 that you would expect to say that they prefer to travel by plane A) 200 people
B ) 205 people
C ) 230 people
D ) 300 people​

Aresearch study is done to find the average age of all u.s. factory workers. the researchers asked every factory worker in ohio what their birth year is. this research is an example of a census survey convenience sample simple random sample