Which of the following statements is false?

a.	Increasing the sample size will always reduce the size of the sampling error when the sample mean is used to estimate the population mean.

b.	Increasing the sample size will reduce the potential for extreme sampling error.

c.	Sampling error can occur when the sample mean differs from the population mean due to the fact that the sample was not a perfect reflection of the population.

d.	There is no way to prevent sampling error short of taking a census of the entire population.