This example seeks to determine whether stress impacts the ability to complete basic mathematics problems (e.g., addition, subtraction, multiplication, division). Twenty-six teenagers were used in all. Thirteen teenagers attempted to solve 100 basic math problems while listening to calm/soothing music and then the other thirteen teenagers attempted to solve 10 basic math problem while listening to loud/stressful music. Are there differences in the number of math problems that were solved based on the stress level of the music they were exposed to? Test with = .05. Calm Music Stressful Music 30 50 21 31 26 26 36 41 31 46 41 56 26 46 46 41 16 26 21 21 26 41 31 51 41 30 Calm music M= 30.15, SD=8.86, SE=2.46, Stressful music M=38.92, SD=11.07, SE=3.07 P=.255 Test statistic=-2.23. h. Calculate percentage of variance accounted for & Cohen's d. If one is not appropriate write NA. i. Percentage of variance = ii. Cohen's d = i. Interpret percentage of variance using specific IV/DV descriptors