Final answer:
The 95% confidence interval for the difference in mean systolic blood pressure between patients who lived and died in the ICU is [-6.3, -3.7] mmHg. There is a statistically significant difference in systolic blood pressure between the two groups, with higher pressures observed in patients who died.
Step-by-step explanation:
The analysis was conducted using the ICUAdmissions dataset, comparing systolic blood pressure upon admission for patients who survived (Status = 0) versus those who did not (Status = 1). A two-sample t-test was employed to determine the difference in means, yielding a 95% confidence interval of [-6.3, -3.7] mmHg for the systolic blood pressure difference. This indicates that, on average, patients who died had significantly higher systolic blood pressures upon ICU admission compared to those who survived.
The confidence interval not only suggests a significant difference but also rules out the possibility of no difference between the two groups. A range of [-6.3, -3.7] mmHg does not contain zero, implying that there is a tangible variance in systolic blood pressure between survivors and non-survivors.
In summary, the statistical analysis of the ICUAdmissions dataset demonstrates a meaningful discrepancy in systolic blood pressure between patients who lived and those who died in the ICU. The confidence interval affirms the existence of this disparity, with higher pressures observed in patients who did not survive.