a all of the above b is likely not representative of the dis

a. all of the above

b. is likely not representative of the distribution of all flights because the investigators chose not to take a SRS

c. could be biased because a convenience sample was taken instead of a simple random sample

d. could be biased because people traveling during Christmas season tend to bring more luggage

Solution

Answer: a

Explanation:

b. is true because since we didn\'t take a SRS, the sample cannot be considered as a true representative of the distribution of all flights.

c. is true because of the fact that choosing a convenience sample means that we include a certain amount of bias in the study. We are ideally expected to choose a random sample to remove this bias.

d. is true too. It gives us a possible example of the bias that is mentioned in c.