STA261 M C Jingzong Zhuo & E Test: Midterm-4e Question 14 This Test: 125 pts possible A health study reported that, in one country, systolic blood pressure readings have a mean of 123 and a standard deviation of 13. A reading above 140 is considered to be high blood pressure, Complete parts a through d below a. What is the z-score for a blood pressure reading of 140? z=(Round to two decimal places as needed.) b. If systolic blood pressure in that country has a normal distribution, what proportion of the population suffers from high blood pressure? The proportion with high blood pressure is (Round to four decimal places as needed.) c. What proportion of the population has systolic blood pressure in the range from 103 to 140? The proportion with systolic blood pressure between 103 and 140 is (Round to four decimal places as needed,) d. Find the 90th percentile of blood pressure readings. The 90th percentile of blood pressure readings is (Round to the nearest whole number as needed.) Time Remaining: 01:08: O 27.C $510 25 ~God CORE GEFORCE RTX