What type of statistical study is most likely to lead to an answer to the following questions? If they study is an experiment, identify the control and treatemnet groups, and discuss whether single-or...

What type of statistical study is most likely to lead to an answer to the following questions? If they study is an experiment, identify the control and treatemnet groups, and discuss whether single-or double-blinding is necessary. If the study is observational, state whether it is a retroperspective studyso, identify the cases and controls.

Which of eight airlines has the highest customer satisfaction?