SDA Tutorial
Finding Variables
Running SDA
Recoding
USING FILTERS
Multiple Variables
Completed Tutorial
Download Report
Again, examining the first row in the table, we can see that of all the respondents who report using the Internet, report spending approximately 9.6 hours each week using the Internet. Somehow, we need to calculate the average reported hours of Internet use but only for people who reported using the Internet. In other words, we need to exclude all respondents who report that they do not use the Internet.
SDA provides a filtering function, another entry in the analysis form, that will allow exactly this. In the following graphic, notice that the row variable is netime, the variable being averaged. The filter box restricts the analysis to cases who responded that they used the Internet between 1 and 90 hours last week, inclusive.
The steps include:
- Open the SDA analysis page for Frequencies or crosstabulation.
- type in the mnemonic netime in the "row" cell in the form.
- Enter the apprropriate filter option ["netime (1-90)"]
- Select appropriate options using the checkboxes:
- Statistics
CHECKED - Suppress table
CHECKED - Question text
CHECKED - Color coding
NOT REQUIRED HERE - Show T-statistic
NOT REQUIRED HERE - Click on "Run the Table."
Click here to open a window to perform this analysis.
Follow the above steps, and you should see that the mean number of hours using the Internet is 45%. Your second analysis is complete!
D/L Report] [Begin] [Find Variables] [Run SDA] [Recoding] [FILTERS] [Multiple Vars.] [End Tutorial]
|
Send us your comments/questions to:
webuse@socy.umd.edu
|
