New answers tagged spearman
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You could code yes-no as 1, 0 (or any other integers) and then use standard formulas and software.
Whether that's any use will depend on your data and your problem.
I'd calculate fraction yes for each age and then plot against age. Some kind of smoother may help if patterns are not obvious.
Two wild guesses are that
Spearman correlation will make ...
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Overview
ANOVA will test the null hypothesis of no group mean differences
Spearman's rho will look at the rank order correlation.
General strategy
The most common strategy that I've seen in this context where the IV is ordinal in nature and has been experimentally manipulated is to
(a) perform a test of the overall ANOVA and then (b) examine polynomial ...
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The question may be "is the independent ordinal variable meaningful". In other words, do each of the steps in the ordinal variable efficiently separate the interval measure. If you plotted the interval measure as comparative boxplots with notches, you could visualize whether the 95% confidence intervals of the median overlap from one step of the ordinal ...
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