Mathematics

Francis Frye

1 May, 18:33

Select all choices which could lead to a biased result.

1. Randomly calling telephone numbers to ask if people are satisfied with their service

2. Randomly calling people whose last name starts with 'W' to ask if they are satisfied with their service

3. Asking high school senior girls what they thought of their school

4. Randomly asking men if they like the feel of a certain towel