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6 (14 pts). A survey wants to know whether people in a city with ages 16-19 years old spend less than 2 hours on TV daily. A sample of 600 people with the ages 16-19 show the sample mean x– = 1.9 hours. Suppose the population standard deviation σ = 0.3 hour. (a) What is the population? What is the sample? (b) At α = 0.01 level of significance, determine whether there is evidence that that the population mean is less than 2 hours. (c) Identify the type of error for your conclusion. Find the probability of error and probability of confidence if it is type I error.

Your next patient had carotid stenting for recurrent narrowing of the ICA following carotid endarterectomy (CEA).  How might this stent affect blood flow velocities?  

Your next patient is complaining of pain in his left calf muscle every time he gets to the third hole at the gold course.  As you scan your patient’s proximal superficial femoral artery you get PSVs of 52cm/s.  Just distal to that you find flows of 258 cm/s.  What would your preliminary report include?

When you are ready to start the exam,  Click “Modules” on the left and open Pearson MyStatLab.  exam 1 will come up in MyStatLab.  Once you answer all the questions in MyStatLab, come back to Canvas and click “Submit Quiz” button below. 

Which of the following statements about this figure is TRUE?  

You are the RT working in the emergency department in a rural hospital (at sea level). A healthy 60-year-old woman was brought to the emergency department in a comatose state, breathing very shallowly. Her family stated that she had taken an overdose of sleeping pills. Arterial blood gases, were obtained while she was breathing room air, revealed a PaO2 of 55 mm Hg, a PaCO2 of 70 mm Hg, and pH of 7.15.  The physician has asked you to calculate the PA02, choose the closest result to your findings below. 

Your carotid duplex study documents an occluded right ICA on a 72 y.o. female.  The left ICA has a 50-69% diameter reduction based on flow velocities.  What is the most likely explanation for the antegrade flow detected in the right anterior cerebral artery (ACA) with TCD?

What is the most likely explanation for the absence of a unilateral carotid bruit in a patient that had one previously documented on a physical exam one year ago?  A 50-79% stenosis was also evident on that previous carotid duplex scan.

During a PPG examination for the evaluation of venous reflux a normal refill time is 

Your carotid duplex study documents a very rounded, continuous right common carotid artery waveform.  What is the least likely reason for that finding?