Airline companies are interested in the consistency of the number of babies on each flight, so that they have adequate safety equipment. Suppose an airline conducts a survey. Over Thanksgiving weekend, it surveys 6 flights from Boston to Salt Lake City to determine the number of babies on the flights. It determines the amount of safety equipment needed by the result of that study.

Select the things that were wrong with the way the survey was conducted. (Select all that apply.)

• The survey uses systematic sampling.
• The survey would not be a true representation of the entire population of air travelers.
• Choosing 6 flights represents a stratified sample.
• Conducting the survey on a holiday weekend will not produce representative results.
• The survey was conducted using six similar flights.