(a) Look at 50 vehicles from a college or university student parking lot. Count the number of twodoor vehicles. Use any sampling method you like (e.g., the first 50 you see). (b) Do the same for a...

(a) Look at 50 vehicles from a college or university student parking lot. Count the number of twodoor vehicles. Use any sampling method you like (e.g., the first 50 you see). (b) Do the same for a grocery store that is not very close to the college or university. (c) Construct a 95 percent confidence interval for the difference in population proportions. Is there a significant difference? Discuss.