The highest possible z-score that is still in the bottom 95% of the systolic blood pressure distribution is z =−1.645 . Use this z-score to determine X, the corresponding systolic blood pressure score. X = This score, X, is the percentile of systolic blood pressure scores among women. The percentile rank of this score is . Systolic blood pressure between 140 and 159 is considered stage 1 hypertension. What percentage of women have systolic blood pressure in this range? 11.13% 13.13% 7.98% 9.01% Systolic blood pressure below 90 is considered hypotension. What percentage of women have systolic blood pressure below 90?

X2 + y 2 = 36 x + y = 6 solve the system of equations.

If 1.4% of the mass of a human body is calcium, how many kilograms of calcium are there in a 165-pound man? 1.0 kg ca 5.1 kg ca 1.0 x 102 kg ca 5.1 x 102 kg ca

Aprisoner is trapped in a cell containing three doors. the first door leads to a tunnel that returns him to his cell after two days of travel. the second leads to a tunnel that returns him to his cell after three days of travel. the third door leads immediately to freedom. (a) assuming that the prisoner will always select doors 1, 2 and 3 with probabili- ties 0.5,0.3,0.2 (respectively), what is the expected number of days until he reaches freedom? (b) assuming that the prisoner is always equally likely to choose among those doors that he has not used, what is the expected number of days until he reaches freedom? (in this version, if the prisoner initially tries door 1, for example, then when he returns to the cell, he will now select only from doors 2 and 3.) (c) for parts (a) and (b), find the variance of the number of days until the prisoner reaches freedom. hint for part (b): define ni to be the number of additional days the prisoner spends after initially choosing door i and returning to his cell.