
| Middle of category | Frequency | Frequency % | Cummulative frequency % |
| 3.61 | 97 | 5.6 | 5.6 |
| 3.72 | 160 | 9.2 | 14.8 |
| 3.82 | 126 | 7.2 | 22.0 |
| 3.92 | 123 | 7.1 | 29.1 |
| 4.03 | 179 | 10.3 | 39.4 |
| 4.13 | 235 | 13.5 | 52.9 |
| 4.23 | 151 | 8.7 | 61.6 |
| 4.34 | 104 | 6.0 | 67.5 |
| 4.44 | 78 | 4.5 | 72.0 |
| 4.54 | 61 | 3.5 | 75.5 |
| 4.64 | 70 | 4.0 | 79.5 |
| 4.75 | 68 | 3.9 | 83.4 |
| 4.85 | 87 | 5.0 | 88.4 |
| 4.95 | 99 | 5.7 | 94.1 |
| 5.06 | 55 | 3.2 | 97.3 |
| 5.16 | 26 | 1.5 | 98.8 |
| 5.26 | 9 | 0.5 | 99.3 |
| 5.36 | 3 | 0.2 | 99.5 |
| 5.47 | 0 | 0.0 | 99.5 |
| 5.57 | 2 | 0.1 | 99.6 |
| 5.67 | 1 | 0.1 | 99.7 |
| 5.78 | 3 | 0.2 | 99.8 |
| 5.88 | 0 | 0.0 | 99.8 |
| 5.98 | 0 | 0.0 | 99.8 |
| 6.08 | 0 | 0.0 | 99.8 |
| 6.19 | 0 | 0.0 | 99.8 |
| 6.29 | 3 | 0.2 | 100.0 |
3.61486139444164...4.57471097850338 3.71776276549941...5.07517381523383 3.82066413655717...4.83628190695148 3.92356550761493...4.81218435537242 4.02646687867269...5.18738580584075 4.12936824973045...5.45958551414416 4.23226962078821...5.01727983681492 4.33517099184597...4.64439089914137 4.43807236290373...4.35670882668959 4.5409737339615...4.11087386417331 4.64387510501926...4.24849524204936 4.74677647607702...4.21950770517611 4.84967784713478...4.46590811865458 4.95257921819254...4.59511985013459 5.0554805892503...4.00733318523247 5.15838196030806...3.25809653802148 5.26128333136582...2.19722457733622 5.36418470242359...1.09861228866811 5.56998744453911...0.693147180559945 5.67288881559687...0 5.77579018665463...1.09861228866811 6.29029704194344...1.09861228866811
FYI: Regression on these (log-log) data points gives a line with slope of -2.02 and y-intercept of 13.14. The correlation coefficient is -0.86749710034544.
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.