Which of the following was not mentioned as a specific limitation ...

[Kthamas]

Which of the following was not mentioned as a specific limitation of mail surveys?
 
  a. nonresponse
  b. lack of uniformity in response
  c. requires large field staff
   d. possible misinterpretation of questions

Question 2

What is a random sample and why must samples be random?
 
  What will be an ideal response?

[sarajane1989]

Answer to Question 1

C

Answer to Question 2

Students should explain that the act of random sampling is a defining feature of a true experiment. Random sampling refers to a process that generates a mathematically random result. It leads to a way to divide a collection of cases into two or more groups in order to increase one's confidence that:
(i) The groups do not differ in a systematic way
(ii) Unknown, extraneous variables are controlled for
(iii) Statistical techniques and reasoning that relies on randomization are used.

[Kthamas]

TY

[sarajane1989]

You're welcome