A fast-food restaurant manager decides to collect data to se…
A fast-food restaurant manager decides to collect data to see why people eat at her restaurant. She decides that for one Saturday, she will give out a free meal to anyone who fills out a survey. She announces the survey with posters in her restaurant. This is the survey: 1. How often do you come to this restaurant? Once a month or less 2-3 times a month 1-2 times a week More than 2 times a week 2. What do you think about the food? Excellent Good Fair Poor 3. What do you think about the prices? Excellent Good Fair Poor The number of people who fill out the survey is about 20% of her weekly patrons. Why will the survey results be invalid?
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