`chisq_p` calculates the p-value for a chi-square test given a contingency table.
Arguments
- a
Frequency count for row 1, column 1.
- b
Frequency count for row 1, column 2.
- c
Frequency count for row 2, column 1.
- d
Frequency count for row 2, column 2.
Value
P-value from the chi-square test.