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Ordered Chi squared or trend tests

I've applied the Stata non-parametric test for trend (nptrend) for a two-way table including one ordered categorical data (quintiles of deprivation index). Such clearly ordered variables are ...
1
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1answer
581 views

What if Cochran-Armitage test (“linear by linear association” for trend in SPSS) is significant but associated chi-square test is not signficant?

I administered a customer service satisfaction survey, and one of the questions is a check-all-that-apply asking respondents to check the boxes for the services that they liked most (medication ...
2
votes
1answer
746 views

Change in proportion in two populations over time

I have a data set composed of two groups which had two different treatments. They are treated over 8 weeks. The endpoint is binary - either they respond or not during each week. Thus, for any given ...
1
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0answers
112 views

Using the likelihood-ratio test as a Cochran-Armitage test for trend

Maybe this is a silly question, but I need to perform a test for trend in a 2x3 contingency table and I've been said to use the Cochran-Armitage test for trend with weights (0, 1, 2). Okay, that's ...
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1answer
423 views

Are my data values too small for chi-squared for trend? If so what trend test can I do instead?

I'm doing a project about dilated kidneys, these can be arranged into mild, moderate and severe. There are 53 patients in total. I want to see if there is a trend in the severity of dilatation between ...