To calculate a test confidence interval for the difference in proportions
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1    Choose Stat > Basic Statistics > 2 Proportions.

2    Do one of the following:

·    If your raw data are stacked in a single column:

1    Choose Both samples are  in one column.

2    In Samples, enter the column containing the raw data.

3    In Sample IDs, enter the column containing the group or population codes.

·    If your raw data are unstacked, that is, each sample is in a separate column:

1    Choose Each sample is in its own column.

2    In Sample 1, enter the column containing the first sample.

3    In Sample 2, enter the column containing the other sample.

·    If you have summarized data:

1    Choose Summarized data.

2    Under Sample 1, enter numeric values in Number of events and Number of trials.

3    Under  Sample 2, enter numeric values in  Number of events and Number of trials.

3    If you like, use any dialog box options, and click OK.