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View Resource Statistical Tools: Two Arm Binomial

This page calculates either estimates of sample size or power for differences in proportions. The program allows for unequal sample size allocation between the two groups.

http://www.swogstat.org/stat/public/binomial_twoarm.htm
View Resource Statistical Tools: One Arm Normal

This page calculates either sample size or power for a one sample normal problem. User inputs hypothesis test parameters.

http://www.swogstat.org/stat/public/one_normal.htm
View Resource Statistical Tools: One Arm Nonparametric Survival

This page calculates either estimates of accrual or power for null and alternative survival functions based on the non-parametric estimate of the survival distribution. The program also gives large sample expected critical values for median survival or survival probabilities.

http://www.swogstat.org/stat/public/one_nonparametric_surviv...
View Resource Statistical Tools: Expected Death Calculator

This page calculates the expected number of deaths, the expected proportion of deaths at a given time, or the time at which a given proportion of deaths have occurred for a planned study. Users can specify a follow-up period after the close of study accrual and a percentage of patients that have no risk. The program assumes uniform accrual and exponential survival.

http://www.swogstat.org/stat/public/expdeath.htm
View Resource Statistical Tools: Frequency Table

This page calculates the standard Chi-square test stastistic and Kruskal-Wallis statistic for data input by users.

http://www.swogstat.org/stat/public/freqstat.htm
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