35 The PPCG Handicap System 2016-02-04T20:02:24.983

32 Compute the Median 2017-01-08T23:28:58.263

30 Mean bits: an average challenge 2016-05-25T01:57:01.960

27 Fake Statistics 2017-04-24T16:53:56.137

26 Interquartile Mean 2016-07-24T13:47:12.610

24 Frequency Distribution of Mixed Dice Rolls 2017-12-10T19:57:58.827

23 Frequency Distribution of Multiple Dice Rolls 2017-10-01T03:23:31.300

19 Calculate Standard Deviation 2015-10-15T17:11:46.067

17 Cross-Alphabetic Characters 2018-03-17T14:36:46.573

16 An Array of Challenges #3: Moving Averages 2017-11-05T15:46:25.740

15 Compute the Wilson score interval 2017-01-03T01:42:12.540

14 Standardize the Samples (Compute the z-Score) 2018-12-14T18:37:04.560

14 Fivenum and a little bit 2019-07-09T21:53:30.283

13 Iterated Moving Average 2016-03-12T20:06:03.230

13 Rank Correlation Coefficient 2017-08-09T19:58:31.800

13 Ten-row bar chart 2017-10-17T08:30:30.760

11 A Free Sample of Autocorrelation 2016-02-17T02:09:44.830

9 Calculate the correlation coefficient 2012-11-28T22:32:28.043

7 Calculate the average and standard deviation, rubiks cube style 2015-12-05T01:30:05.700

7 Fun with strings and string lengths 2016-08-11T10:30:53.357

7 Let's play POKE! 2017-05-23T23:42:41.727

6 Find the smallest number of participants with resulting percentages 2017-12-05T13:55:41.757

6 Ordinary Least Squares Regression 2018-09-22T10:11:12.123

3 Correlation Coefficient of Words 2016-10-09T11:54:03.280

2 Average Idle-Dice Rolling 2019-03-01T22:45:30.633

-2 Restricted average (arithmetic mean) – i.e. without obvious built-ins 2016-05-18T07:11:02.127