An experiment was done to look at whether there is an effect of the number of hours spent practicing a musical instrument and gender on the level of musical ability. A sample of 30 participants (15 men and 15 women) who had never played a musical instrument before were recruited. Participants were randomly assigned to one of three groups that varied in the number of hours (0 hours, 1 hours, 2 hours) they would spend practicing every day for 1 year. After one year, their level of musical skill was measured on a 10-point scale ranging from 0 (you can't play for toffee) to 10 ('Are you Mozart?'). The SPSS output tables are given below.

Tests of Between-Subjects Effects Dependent Variable: Level of musical skill from 0 (cant play for toffee) to 10 (sorry, are you Mozart?) purce Corrected Model 121.200 24.240 7.904 Intercept 811.200 811.200 | 264.522 Gender 3.333 3.333 1.087 Practice 106.400 53.200 17.348 Gender * Practice 11.467 5.733 1.870 Error 73.600 3.067 Total 1006.000 Corrected Total 194,800 a. R Squared = .622 (Adjusted R Squared = .543)