The sample plan refers to:
A) the process used to select units from the population to be included in the sample
B) the process used to select units from previous samples into the present sample
C) the process used to select units from the population into a sample size formula
D) the process used to select units from the population to be included in telephone surveys
E) the process used to determine which members of the sample should be contacted
Answer: A) the process used to select units from the population to be included in the sample