Question 18 (4 points) Low-Density Lipoprotein (or LDL) is considered the "bad" cholesterol because it forms plaques in arteries, raising the risk for heart attack and stroke. Suppose you are interested in predicting LDL (in mg/dL) using one's age (in years). Assume that LDL levels and age are normally distributed and that the correlation between the two variables is 0.534. Based solely on the regression effect, a person whose age is at the 60th percentile is predicted to have an LDL level [Source: Ldl cholesterol: Definition, risks, and how to lower it. (2020, March 09). Retrieved from https://www.webmd.com/heart-disease/ldl-cholesterol-the-bad-cholesterol] ( A) above the 60th percentile ( B) below the 60th percentile O C) exactly at the 60th percentile ( D) I need more information to answer this O E) exactly at the 40th percentile Previous Page Next Page Page 6 of 9Question 19 (4 points) The Philippine eagle, the national bird of the Philippines, is one of the endangered species in the planet. This is attributed to the fact that they breed once every 2 years, and that average time to hatching of their offspring is 63 days. [Source: Sison, E (n. d.). Pithecophaga Jefferyi (great Philippine eagle). Retrieved from https://animaldiversity.org/accounts/Pithecophagajefferyi Suppose the time of hatching has a standard deviation of 14 days. There is a ___ chance (or probability) that the average time to hatching of eggs laid by 50 Philippine eagles is 60 days or below. Q A) 6.43% O B) 41.68% C) C) 48.80% C) D) 93.57% C) E) 58.32% Question 20 (4 points) The mean arterial pressure (or MAP, average arterial pressure in one cardiac cycle) is a measure for perfusion status. You are interested to know if it is possible to predict an adult's MAP (Y) based on the body surface area (X). Suppose you randomly selected 50 adults, and measured their mean arterial blood pressure (in mmHg) & body surface area (in m2). The results are reflected below: f=1.6 Sx=0.5 y=80.1 sy= 16.9 r=0.8 [$0urce: Nall, R. (2018, April 10). Mean arterial pressure: Normal, low, high readings plus treatment. Retrieved from https://www. health/ine.com/health/mean-arterial-pressure] There is a 99.7% chance that the actual MAP of those with body surface area of 1.66 m2 falls between ___ and O A) 58.9; 104.5 0 B) 71.6; 91.9 C) C) 61.5; 102.0 C) D) 66.5; 96.9 0 E) 51.3; 112.1