Weight your report data using questions from this survey or
another survey, or profile variables, as weight variables.
-
Prepare your report data to be weighted:
-
Filter out participants with missing values.
If you plan to use a profile variable as a weight variable,
create a filter
that includes all profile variable values. This will implicitly exclude
participants who do not have values for that profile variable.
-
Merge and append any answers you want to display as a single
option in your report.
For more information, see
Merge answers.
Note: If you merge and append answers after you apply the weight
scheme, an error message will appear.
-
Ensure you don't have outliers or disproportionately small
groups in your weight variables.
This can cause problems with your weight scheme. For example,
let's say you receive 100 responses from senior citizens aged 65+ and 5
responses from senior citizens aged 80+. The weight scheme you apply could
distort your data by under-representing the importance of the 100 responses and
overinflating the importance of the 5 responses.
To avoid this potential issue, you can:
- Adjust your weights
to more closely reflect the general population.
- Merge the outliers
with the next biggest group (for example, merging the 5 participants aged 80+
with the 100 participants aged 65+).
-
On the report toolbar, click
.
-
In the
Weighting dialog, click
New Weight Scheme.
-
Add a weight variable.
-
From the
Source list, select a source for the
weight variable:
-
This
Survey
-
Respondent
Variables
-
Profile
Variables
-
Another
Survey
-
From the second list, select a question, profile variable, or
the survey.
Note: You can only choose Single Choice questions as weighting variables if they have fewer than 50 answer options.
-
If you selected
Another Survey as the source, select the
question to use as a weight variable.
-
Click
Add.
Note: To reduce the wait time loading weight
variables, it is recommended to first click
Apply and add weight variables with their original
weight. Then, adjust the weighting.
-
On the next screen, specify target percentages for each answer
category.
Valid target percentages must:
- Add up to 100% total.
- Contain numbers only
(not letters or special characters).
- Be positive numbers
(not negative numbers).
- Be set to 0 if the
sample percentage value is 0.
- Be set to a value
above 0 if a value above 0 exists for the sample percentage.
-
Optional:
To add another weight variable, click
+ Weight Variable, and then repeat steps 4 and
5.
You can have a maximum of 5 weight variables.
-
When you are finished, click
Apply.
The application weights report data according to the weight scheme
you created. When the process completes, the reports displays adjusted totals
for answer categories.
At the top of the report, a description of the weight scheme
appears. You can click the
Efficiency link to view the Weighting
Efficiency Report or click
Remove to remove the weight scheme.
A breakdown of the weighted base, effective base, and unweighted
base also appears for each question.
Chart view:
Table view:
When you
export your report to CSV, the
weight values are included in a separate column.
Note:
- The tables for
Numeric and Allocation questions do not have rows showing weighted, effective,
and unweighted bases.
- Weighting is not
applied to Highlighter, Image Upload, or Open End questions.
