
| Middle of category | Frequency | Frequency % | Cummulative frequency % |
| 3.70 | 83 | 7.2 | 7.2 |
| 3.81 | 215 | 18.8 | 26.0 |
| 3.91 | 151 | 13.2 | 39.2 |
| 4.01 | 45 | 3.9 | 43.1 |
| 4.11 | 32 | 2.8 | 45.9 |
| 4.21 | 23 | 2.0 | 47.9 |
| 4.32 | 16 | 1.4 | 49.3 |
| 4.42 | 23 | 2.0 | 51.3 |
| 4.52 | 19 | 1.7 | 53.0 |
| 4.62 | 15 | 1.3 | 54.3 |
| 4.73 | 61 | 5.3 | 59.6 |
| 4.83 | 55 | 4.8 | 64.4 |
| 4.93 | 60 | 5.2 | 69.6 |
| 5.03 | 82 | 7.2 | 76.8 |
| 5.13 | 80 | 7.0 | 83.8 |
| 5.24 | 81 | 7.1 | 90.8 |
| 5.34 | 49 | 4.3 | 95.1 |
| 5.44 | 32 | 2.8 | 97.9 |
| 5.54 | 17 | 1.5 | 99.4 |
| 5.65 | 5 | 0.4 | 99.8 |
| 5.75 | 2 | 0.2 | 100.0 |
3.7032030817616...4.4188406077966 3.80540884006353...5.37063802812766 3.90761459836545...5.01727983681492 4.00982035666738...3.80666248977032 4.1120261149693...3.46573590279973 4.21423187327122...3.13549421592915 4.31643763157315...2.77258872223978 4.41864338987507...3.13549421592915 4.520849148177...2.94443897916644 4.62305490647892...2.70805020110221 4.72526066478085...4.11087386417331 4.82746642308277...4.00733318523247 4.9296721813847...4.0943445622221 5.03187793968662...4.40671924726425 5.13408369798854...4.38202663467388 5.23628945629047...4.39444915467244 5.33849521459239...3.89182029811063 5.44070097289432...3.46573590279973 5.54290673119624...2.83321334405622 5.64511248949817...1.6094379124341 5.74731824780009...0.693147180559945
FYI: Regression on these (log-log) data points gives a line with slope of -0.87 and y-intercept of 7.65. The correlation coefficient is -0.503816641475467.
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.