Select menu: Stats | Survey Analysis | Single-stage Survey Analysis
Use this to do a design based or ratio analysis for a simple or stratified random survey.
- After you have imported your data, from the menu select
Stats | Survey Analysis | Single-stage Survey Analysis. - Fill in the fields as required then click Run.
You can set additional Options and store the results by clicking Store.
Available data
This lists data structures appropriate to the current input field. The contents will change as you move from one field to the next. You can double-click a name to copy it to the current input field or type it in.
Design
Used to switch to either a simple random survey or a stratified random survey
Data
This is the variate containing the survey data to be analysed. It should contain a value for each unit in the population, with unsampled or non-responding units being indicated by missing values.
Method
Specifies whether to analyse using expansion raising or ratio estimation. Select Design based analysis if you want to use expansion raising (i.e. the usual stratified random sampling analysis) but within a stratum units must either all have base data or all lack it. Alternatively, select Ratio analysis to supply base data for ratio estimation.
Base (X) data
For a ratio analysis this specifies a variate containing the auxiliary data to form the denominator of the ratio. This must be present for each unit within a stratum, although if base data is not available for a stratum all units in that stratum may be set to missing value. If a stratum contains a mixture of base data and missing values a fault will result.
Stratification factor
For a stratified random survey, this is the factor indicating the stratum to which each unit belongs.
Labels
This is an optional variate, factor or text which is used to label influential points. If it is left blank points are labelled by the numbers 1…n.
Data format
The variate specified in the Data field may either contain all the units in the population, with unsampled or non-responding units indicated by missing values, or it may just contain the responses. If this option is set to Response data only, the population sizes field must be set.
Population sizes
Where the data contains only the response data, this field is used to indicate the total number of units in the population for each stratum. These are supplied in a variate or table with one value for each stratum or, in the case of a simple random design, a single number.
Base data totals
For ratio estimation this should contain the population totals of the base data in each stratum.
Action Icons
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Pin | Controls whether to keep the dialog open when you click Run. When the pin is down the dialog will remain open, otherwise when the pin is up  the dialog will close. |
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Restore | Restore names into edit fields and default settings. |
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Clear | Clear all fields and list boxes. |
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Help | Open the Help topic for this dialog. |