Customer satisfaction data

A customer relations manager for a chain of restaurants wants to use a survey to assess customer satisfaction. The restaurant manager tests the survey questions in a pilot study to ensure that the questions consistently measure customer satisfaction. The manager randomly chooses 50 customers, asks them three questions, and records their responses on a 5-point Likert scale, where 1 is Not satisfied/Unlikely and 5 is Very satisfied/Highly likely.

You can use this data to demonstrate Item Analysis.