Table of critical chi square values for various degrees of freedom at various levels of alpha also used with Mahalanobis tests The calculators display expected frequencies and graphs of the proportions of responses across either columns or rows. This spreadsheet contains calculators that produce chi square values and p-values from observed frequencies for six common (1x2, 1x3, 2x2, 2x3, 3x2, and 3x3) contingency tables. It also provides a Student's t table of critical values for a two-tailed test and for a one-tailed test at various levels of significance This spreadsheet contains calculators that determine a critical t-value for a given alpha and that determine a probability for a given t-value. Click on the name of a calculator to download it
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