An market researcher is conducting customer satisfaction surveys for a national restaurant chain with 200 restaurant. The researcher randomly selects a sample 10 of the restaurants and interviews all customers over a two-day period. What sampling technique was used?

elect the scenario below that demonstrates sampling bias. Select the correct answer below: A study is conducted about which type of a credit card customers prefer. The employees of American Express Co. were used as the sample. A hospital conducts a study about the quality of a new MRI machine. All patients who use the machine were used as the sample. A study is conducted to determine people's preference for specific streaming services. Ten people were randomly selected and asked about their preferences for streaming services. A restaurant manager wants to determine the quality of its servers' performance so she asks each of the restaurant's patrons to give a rating of their experience with their server.

What would be the better research method to use if trying the Hypothesis of Customers prefer a battery that lasts longer between charges to other smartphone features?

The Peach Pit is a café that wishes to know if their online ratings accurately represent their performance or are the result of a loud minority. Wanting to please their biggest customers, they decide to only survey those who spend over $40. To ensure they get feedback, the restaurant managers decide they will personally ask diners when presenting them with the bill. a) Identify the sampling method used. b) What types of error or bias (if any) could result from this scenario?