I want to perform a chi-squared test between two values with missing data. How can I do this? I've looked this up several times and across different sources, none of which had been successful.
Calculate Chi-square with NA values
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I assume that you want to perform a chi-squared test between two random variables x, y using the Pearson's Chi-squared test.
You can use the formula as it is i.e.
chisq.test(x,y)orchisq.test(cont_table)where cont_table is the contingency table of random variables x and y.As it is mentioned on the documentation of the function (link1):
"If x is a matrix with at least two rows and columns, it is taken as a two-dimensional contingency table: the entries of x must be non-negative integers. Otherwise, x and y must be vectors or factors of the same length; cases with missing values are removed, the objects are coerced to factors, and the contingency table is computed from these."
You cannot (and should not) perform a chi-squared test with missing values included in your vectors/matrix because it would lead to erroneous results.
check these links for more info: link1 link2