Statistics Calculators

File Name
(Click hold mouse button, select "save as" to Download)

Calculator Name

Function of Calculator

confin95.xls

95% confidence intervals

You specify the confidence interval you are interested in, it calculates the interval around an effect size estimate for: differences, relative risk, relative risk reduction, and odds ratio.

ProbCI.xls

Confidence interval for probabilities, proportions

You specify the number of events and the total number of observations, it calculates the confidence interval for that probability.

fishersz.xls

Fisher z-transformation for doing statistical tests on correlations

You specify correlation, it produces Fisher's Z transformation. And the reverse.

logit.xls

Logit and logistic functions demonstrated

You state a number, it produces the logit; likewise for the logistic function (inverse of the logit). Demonstrates the basis of logistic regression for predicting the probability of a category.

odd-prob.xls

Odds and probabilities

Translates between odds and probabilities. Graphs the relations.

Chisq2x2.xls

Chi-squared test

Calculates Chi-squared statistic and probability for 2 by n tables, for n = 2 through 7.

RatePower.xls

Rate or Proportion Confidence Interval & Power Estimation Calculator

Calculate the power that a rate will exceed a target rate given N.

TripTria.xls

Triplet Triangulator

Places a triplet of numbers in trilinear coordinates within a triangle.