Input Values 

Undertake a chisquared test on a contingency table created from original data.
Inputs are the desired level of confidence in the estimate, the desired precision of
the results and two columns of data: The first column is observations on a single risk
factor while the second column is corresponding observations of a disease (or other) outcome.
Include a header row of column identifiers.
Outputs include:
 The table of observed counts, with row and column totals;
 A table of row proportions (each cell as a proportion of the corresponding
row total), with row totals;
 chisquared statistic, degrees of freedom and corresponding Pvalue; and
 a stacked bar chart of cell frequencies for each column category in each row category.
Additional outputs are included if there are only two columns of data
(column variable is dichotomous):
 table and graph of proportions (as a proportion of row total) and associated confidence limits
for the first column in each row.
