Researcher wanted to see music-based physical training's influence on oderly people's balancing and walking efficiency. A group of participants walked in time to music and responded to changes in the music's rythm during a 1 hour per week exercise program. 6 months later, their walking speed was compared to individuals in the control group.

Control	Music Based Training
n= 16	n=16
M=23	M=20
SS=104	SS=160

a) Did the results indicate a significant difference in walking speed for the two group? Conduct a two tailed test at =0.05.

b) Compute Cohen's d to measure the effect size.