Hi, a friend of mine are studying a desease (Tetano) and testing a
vaccine taken by patients twice but ... he is interested in to
investigate if people are returning to the hospital for the second dose.
In a pilot experiment, from 20 patients, only one had returned for the
second and last dose. The question is... how to test this ?
I was thinking in to use a test for independent proportions (1/20 and
19/20) but some friends are suggesting a chi-square test !
Any suggestions ?
Thanks,
Voltolini
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