
| Middle of category | Frequency | Frequency % | Cummulative frequency % |
| 3.69 | 473 | 25.8 | 25.8 |
| 3.80 | 691 | 37.7 | 63.5 |
| 3.90 | 366 | 20.0 | 83.5 |
| 4.00 | 139 | 7.6 | 91.1 |
| 4.11 | 59 | 3.2 | 94.3 |
| 4.21 | 23 | 1.3 | 95.5 |
| 4.31 | 17 | 0.9 | 96.5 |
| 4.42 | 11 | 0.6 | 97.1 |
| 4.52 | 14 | 0.8 | 97.8 |
| 4.62 | 7 | 0.4 | 98.2 |
| 4.73 | 5 | 0.3 | 98.5 |
| 4.83 | 6 | 0.3 | 98.8 |
| 4.93 | 7 | 0.4 | 99.2 |
| 5.04 | 4 | 0.2 | 99.4 |
| 5.14 | 10 | 0.5 | 99.9 |
| 5.24 | 0 | 0.0 | 99.9 |
| 5.35 | 1 | 0.1 | 100.0 |
3.69224603721144...6.15909538849193 3.79572637197489...6.53813982376767 3.89920670673834...5.90263333340137 4.00268704150179...4.93447393313069 4.10616737626523...4.07753744390572 4.20964771102868...3.13549421592915 4.31312804579213...2.83321334405622 4.41660838055557...2.39789527279837 4.52008871531902...2.63905732961526 4.62356905008247...1.94591014905531 4.72704938484592...1.6094379124341 4.83052971960936...1.79175946922805 4.93401005437281...1.94591014905531 5.03749038913626...1.38629436111989 5.1409707238997...2.30258509299405 5.3479313934266...0
FYI: Regression on these (log-log) data points gives a line with slope of -3.48 and y-intercept of 18.67. The correlation coefficient is -0.925016082978145.
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.