Question 13 (4 points) A double-blind experiment is a type of prospective study. True False Question 14 (4 points) In the Nurses' Health study (Source: http:www.nurseshealthstudy.org), a large cohort of 30,0 women are followed over many years to track the incidence of chronic disease a risk factors that may be present. Information about the samples have been collect from 1996-2012. One finding that emerged was that for participants havin Rheumatoid Arthritis it was found over time that they were at increased risk f developing COPD and asthma. What type of study is this? A) Double-blinded study B) Retrospective study O C) Randomized controlled experiment ( D) Prospective study O E) Single-blinded study MacBook Pro & PK 3 4 5 8 O E R T Y U OQuestion 15 (4 points) Past observations suggest that patients who underwent carotid endarterectomy (an operation that removes blockage from the inside of a carotid artery to restore blood flow to the brain) take about 3 to 4 weeks before they can resume their usual daily routine (Source: Average carotid artery surgery recovery time. (2019, November 20). Retrieved from http://brvsc.com/average-carotid artery-surgery-recovery-time/). Assuming that the recovery time follows a normal distribution with an average of 3.5 weeks and a standard deviation of 0.82 weeks, what is the probability that a random patient who was subjected to this medical procedure will recover in 3 weeks or less? A) 0.2709 B) 0.7291 C) 0.3902 D) 0.6098 O E) -0.6098 MacBook Pro $ "> & 4 5 6 7 8 R T Y U 0 F G H