Question

e Distributions tool to help answerthe questions that follow. To find the probability above or below a z-score, dlick on the normal curve icon with one line, and position the line at t priabe z-score on the hortzontal axis. The areas under the standard normal curve above and below the z-score will be yed to the left and right of the vertical line, respectively. To find the probability between two z-scores, click on the norm icon with two lines, and position the left line at the lower z-score and the right line at the higher z-score. The area unde ormal curve between the vertical lines will be displayed in blue. ndard Normal Distribution n 0.0 ndard Deviation 10 1 AA ighest possible z-score that is still in the lowest 80% of the systolic blood pressure distribution is z his z-score to determine x, the corresponding systolic blood pressure score. x score, x, is the percentile systolic blood pressure scores among senior citizens. The percentile rank of this score lic blood pressure between 120 and 139 is considered prehypertension. What percentage of senior citizens have systolic pressure in this range? 23 18% 19.45% 21.66% 25.13% lic blood pressure balow 91 is considened hyypocansion. what percentagee of senior ctizens have systolic biood pnessure s 917 25 13% 18 AL 20.43 % 24.47% Type her

Answer 1

BP Seones for senior eihzens - 2 12) 2 -NC0,1) 4) P (z) O.8 - 0.8 P(Xot 0.8 P(X x)- 0.84 x127.6G 0-8 x the 80th hen centile ) P(496X1)- = a3)-0) 139-116 420-110 2.4 23. 189/6 CA) 0.23 18 3) PCX91) P 0)- -0.9) 91-116 O.1841 1&41 o (B) -1- 0/09)