There is no readily available report that filters study statistics based on a specific device type. However, you can manually filter raw data.
Example
You want to get the study completion statistics for respondents who completed the survey on a mobile device.
Detailed Steps
Export the Raw Data
- Create an export.
- Add the system question CompletionTime.
By default, the CompletionTime of the study is already available in the Quick Select section of the Edit Questions menu of your export. - In the export filter, add the condition: ResponseStatus is Completed AND DeviceType is Phone.
- Run the export.
- Download the file.
Calculate the Study Completion Statistics
All completion time calculations, except median, use a formula for calculation where only values within one standard deviation of the mean are used. This is because some people will respond over a number of days, which skews the numbers.
- Calculate the Mean CompletionTime.
You could do this in Excel by using the function AVERAGE. - Calculate the Standard Deviation.
You could do this in Excel by using the function STDEV.S - Calculate One Standard Deviation from the Mean.
You just need to add the Mean CompletionTime and Standard Deviation. - Shortest Study Completion Time is the shortest CompletionTime.
- Average Study Completion Time is the averege CompletionTime excluding values that are One Standard Deviation from the Mean.
- Longest Study Completion Time is the longest CompletionTime that is not greater than One Standard Deviation from the Mean.
- Median Study Completion Time is the median of all CompletionTime.
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