Recommendations: suggest a few policy recommendations based on finding and literature review:

The statistical analysis was conducted using RStudio. RStudio was selected for its reproducibility, flexibility, and alignment with the master-code requirements. The data set used, Medicare Geographic Variation Public Use File from CMS (n.d.) includes county-level data on ambulatory visit rates stratified by race.

The analysis focused on comparing the average number of ambulatory visits per Medicare enrollee between Black and White beneficiaries. This included descriptive statistics (mean, standard deviation, sample size), Welch Two-Sample t-test, and a boxplot and attempted density plot for visual comparison.

Descriptive Statistics:

Group	Mean	SD	N
Black	76.26	7.70	1540
White	80.24	7.62	1906

T-test Results:

t = -15.16, df (degrees of freedom) = 3280.2, p

95% CI (Confidence Interval): [-4.49, -3.47]

Conclusion: These results provide compelling statistical evidence of a racial disparity in ambulatory care utilization among Medicare enrollees. The mean difference of approximately four visits per enrollee is not only statistically significant (p