Bias can be present in any ______ collected from a population and may affect the results of a statistical investigation.

Select all the open questions.

A food delivery company designs this questionnaire. How often do you get food delivered? [once or twice /often / all the time] How could their question be improved?

The owner of a café in Oakfield wants to see if they can expand to the town of Rowanwood. They ask 15 of their neighbours in Oakfield if they would use a new café. How can they improve their sample?

The owner of a café wants to find out what their customers think of their new coffee brand. What type of sample should they take?

The owner of a café in Oakfield wants to find out what their customers think of their new coffee brand. Match each type of sample to a suitable example.