Which of the following is a category of sample bias resulting ...

[dmcintosh]

Which of the following is a category of sample bias resulting from some respondent action or inaction?
 a. systematic error
 b. interviewer error
 c. respondent error
 d. primary error

Question 2

The number of times a target audience needs to be exposed to a message before the advertiser's objectives are met is known as ____.
 a. frequency
 b. reach
 c. effective frequency
 d. effective reach

[Jossy]

Answer to Question 1

c

Answer to Question 2

c

[dmcintosh]

Thanks for the timely response, appreciate it

[cici]

Wow, this really help