A sports psychologist wondered whether supplementing team practice with individual practice would increase athlete performance. To assess this, she selected a random sample of 54 athletes and calculated the average number of points they scored per game (M_{PreIntervention} = 15.72). Then she implemented a two-month intervention: each athlete engaged in three hours of individual practice above and beyond the time spent in team practice. At the end of the intervention, the psychologist again calculated the average number of points the athlete's scored per game (M_{PostIntervention} = 17.10). The standard deviation of the difference score was s_D = 3.97. Did the intervention improve athlete performance? Usea = 0.05. If appropriate, calculate an effect size and a 95% CI.'

What test should we use for this scenario.