1. Systolic blood pressure was measured (in units of mm Hg) during preventative health examinations on people in Dallas, Texas. Here are the measurements for a subset of these patients. 112, 128, 108, 129, 125, 153, 155, 132, 137 V (a) How many individuals are in the sample (i.e., what is the sample size, n)? (b) What is the mean of this sample? (c) What is the median of this sample? (c) Compute the sum of squares using two different formulas. Are they the same? (d) What are the mean deviation, variance, s astandard deviation, and coefficient of variation? (include the measurement unit for each)

Table 1 Blood pressure recordings for all positions Body positions Mean systolic BP Mean diastolic BP Sitting position Standing position Supine position Supine position with crossed legs 102-8 + 11-4 65-7 + 82 99.9 + 10-2 66-0 + 8-7 107-9 + 10-7 66-9 + 96 107-0 + 86 66-7 + 7-3 F= 444, P 00s BP, blood pressure. Table 2 Pairwise comparisons between positions in systolic BP Sitting position position Standing Supine position Standing position Supine position Supine position with crossed legs *, the mean difference is significant at the level 0-05 level. Adjustment for multiple comparisons: Bonferroni. Does age factor has any influences in the blood pressure with the change of body positions?

Systemic blood pressure is defined as the ratio of two pressures—systolic and diastolic—both expressed in millimeters of mercury. Normal blood pressure is about 120mm/80mm which is usually just stated as 120/80. What would normal systemic blood pressure be if, instead of millimeters of mercury, we expressed pressure in each of the following units, but continued to use the same ratio format? Part A) atmosheres = a)120/ 80 b) 2.32/ 1.54 c) 0.158/ 0.105 d) 1.60x10^4/ 1.06x10^4   Part B) torr = a) 120/ 80 b) 2.32/ 1.54 c) 0.158/ 0.105 d) 1.60x10^4/ 1.06x10^4   Part C) Pa = a)120/ 80 b) 2.32/ 1.54 c) 0.158/ 0.105 d) 1.60x10^4/ 1.06x10^4   Part D) N/ m^2 = a)120/ 80 b) 2.32/ 1.54 c) 0.158/ 0.105 d) 1.60x10^4/ 1.06x10^4   Part E) psi = a)120/ 80 b) 2.32/ 1.54 c) 0.158/ 0.105 d) 1.60x10^4/ 1.06x10^4

Which of the following is within the normal range of values for this blood test? Choose from the following: (A) 0 - 15 mm/h (B) 2-7 minutes (C) 16-18 gm/dL (D) 45%