Reference no: EM13948358

1) Missingness mechanisms:

a. Describe the difference between MCAR, MAR and MNAR missingness.

b. Give an example where you would expect to find missingness of each of these types in survey research.

2) Describe 3 methods of handing item nonresponse. For each method, list at least one advantage and one disadvantage for this method.

3) Describe three reasons why respondents may refuse to participate in a survey. For each reason, provide a suggestion for how to avoid these cases of nonresponse.

4) Fill in the table with the appropriate post-stratification weights (w_i4):

	Col A	Col 13	Col C	Col D
Age and Sex	Population (N)	Proportion of Population	Sample (n)	Proportion of Sample	Post- stratification weight
18 - 34: Male	2,000		30
18 - 34: Female	1,760		40
35 - 64: Male	1,440		50
35 - 64: Female	1,600		60
65+: Male	400		10
65+: Female	800		10
Total	8000	1	200	1	NA