Blood pressure readings were obtained from 200 adults admitted to a hospital intensive care unit, as part of a largerstudyaimed at predicting patient survival until hospital discharge.

• Go tohttp://lock5stat.com/statkey/.

• Click onOne Quantitative and One Categorical Variable, under theDescriptive Statistics and Graphs column.

• Click on theStudent Survey (TV by Gender)button and selectICU Admissions (Blood Pressure by Status).

You should see a dot plot of blood pressure by status for patients in ICU admissions.

1. Do all of these measures give you about the same number? If not, explain why they differ.
2. What do the lines at the top and bottom of the box (or left and right, in this case) represent? What percentage of the blood pressure values are contained in the box?
3. Is thevariability of blood pressure similar for both sets of patients? Explain your reasoning.