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
|