I am using SPSS 11.5.
Trying to compare two Kaplan Meier survival curves, but even though I click on Log rank test, pool over strata, the program prints out the table showing alive and dead individuals by time, the survival curves, but not the statistical comparison of the two curves.
You may be having the same problem I was:
SPSS does perform the test, but it lumps it in with all the text in the output, which is beyond the limit of what SPSS likes to display. If you stretch the box containing the text output downwards as far as it can go, or copy & paste it into Excell, you should find your test statistic.
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The median of this distribution is found as follows. The number of data elements is even, so there is no (actual) middle element. We will need a virtual one.
The two elements in the middle are the 5th and 6th elements. Between the two of them we insert a (virtual) element which will be called the median. Its value is the average value of the the 5th and 6th elements. 1,2,3,4,5,5.5,6,7,8,9,10
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You will have to use a logic saying If subject1 > 34 and subject2 >34 and subject3 > 34.
Idead is to tell the prog that all subjects have to be > 34 by using the AND function. If you use OR function, then the first subject having > 34 will complete the condition and you will get the result, which will be wrong. So, use the AND function. How? Use the help on Using functions in Excel or whatever you are using. They all have it inbuilt.
your best bet is to contact the makers of SPSS with the serial number from the cd and explain the issue you are having. they will give you a new key or sort out the problem you are having with the license key you have.