![]() You can create the distribution by entering frequencies or by entering probabilities, and the last probability will be automatically calculated for you. You can create a custom discrete distribution with a small or huge number of possible values. Sample Size Calculator will easily calcualte the required sample size needed for a given confidence level and margin of error to construct a confidence interval for a mean or proportion.Goodness of Fit Test allows you to enter 2+ outcomes, how many were observed and the expected frequency (or proportions) to perform a Chi-Square test.2 Factor Contingency Table allows you to enter an m×n grid of frequencies, run a Chi-Square test for indepdendence, or (for a 2x2 grid) various tests for a difference in proportions (e.g.You may apply transformations to the variables and perform quadratic and cubic regression, and convert variables to dummy variables as well. ![]() ![]() You can calculate summary statistics and run normlaity tests for each variable, view pairwise scatterplots and residual plots for each X variable.
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