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#1
Report 17 years ago
#1
i am doing course work and have data that is unrelated, and i believe to be interval??????

the test was for recall at diff levels of processing- so there are recalled word results and incorrect results for every participant in each of the 3 conditions.
i want to comapare two conditions at a time to find if there is a significant difference between the 2.

what test sholud i use- unrelated t-test or man-whitney u???
is my data definately ordinal?

its an emergency deadline looming.
thanks
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Report 17 years ago
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sorry that should be is data definately interval???
thanks
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HelenBrownsell
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Report 17 years ago
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Its sounds like ratio data to me as you cant get a minus number of answers correct. Unless you are taking one set of scores away from another when it is possible to get a minus number, then it would be interval. Basically, if the data has a true zero point, it is ratio but if it can have minus numbers, it is interval.

I think you are using a repeated measures design as all of the participants are doing all three tests, which would suggest you need to use the related t-test.

Hope that helps.

Helen Brownsell
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