Define sampling bias in general and non-response bias in particular. List some techniques that can be used to increase the response rate and reduce non-response bias.

1. Explain the difference between probability and non-probability sampling, and describe the major types of probability sampling.
2.
Define sampling bias in general and non-response bias in particular. List some techniques that can be used to increase the response rate and reduce non-response bias.
3.
List the four major ways to conduct a survey along with some pros and cons of each.