
| Middle of category | Frequency | Frequency % | Cummulative frequency % |
| 3.61 | 77 | 22.1 | 22.1 |
| 3.71 | 105 | 30.2 | 52.3 |
| 3.81 | 49 | 14.1 | 66.4 |
| 3.91 | 33 | 9.5 | 75.9 |
| 4.01 | 16 | 4.6 | 80.5 |
| 4.11 | 15 | 4.3 | 84.8 |
| 4.21 | 21 | 6.0 | 90.8 |
| 4.31 | 5 | 1.4 | 92.2 |
| 4.41 | 10 | 2.9 | 95.1 |
| 4.51 | 7 | 2.0 | 97.1 |
| 4.61 | 4 | 1.1 | 98.3 |
| 4.72 | 3 | 0.9 | 99.1 |
| 4.82 | 1 | 0.3 | 99.4 |
| 4.92 | 0 | 0.0 | 99.4 |
| 5.02 | 1 | 0.3 | 99.7 |
| 5.12 | 0 | 0.0 | 99.7 |
| 5.22 | 0 | 0.0 | 99.7 |
| 5.32 | 0 | 0.0 | 99.7 |
| 5.42 | 0 | 0.0 | 99.7 |
| 5.52 | 1 | 0.3 | 100.0 |
3.60627931229148...4.34380542185368 3.70713413128638...4.65396035015752 3.80798895028127...3.89182029811063 3.90884376927617...3.49650756146648 4.00969858827107...2.77258872223978 4.11055340726597...2.70805020110221 4.21140822626086...3.04452243772342 4.31226304525576...1.6094379124341 4.41311786425066...2.30258509299405 4.51397268324556...1.94591014905531 4.61482750224045...1.38629436111989 4.71568232123535...1.09861228866811 4.81653714023025...0 5.01824677822004...0 5.52252087319453...0
FYI: Regression on these (log-log) data points gives a line with slope of -2.75 and y-intercept of 14.20. The correlation coefficient is -0.945571062834323.
This program is a version of demo.cgi by Sanford Morton, heavily modified by Michael Grobe to include data input, categorization, and regression. The program uses Perl module Chart::Plot, written by Sanford Morton and downloaded from www.speakeasy.org, to draw plots.