College can be free for all because professors will simply volunteer their time to teach.  They don’t need to be paid.

Mrs. HM is having ocular pneumoplethysmography (OPG).  Her brachial blood pressure measurements are considered to be within normal limits: 122/76 on the right and 126/74 on the left.  As you prepare to perform the study, how much vacuum pressure will you apply? 

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?

With a  subclavian artery stenosis on the right side:

A patient describes a 30 minute episode of garbled speech.  This is called:

1 (14 pts). A manager of a LED lightbulb factory wants to know the population mean lift expectance of the bulbs manufactured. A sample of 28 bulbs is selected and the sample mean x– = 36900 hours and the sample standard deviation s = 594 ounces.  (a) What is the population? What is the sample? (b) Construct a 90% confidence interval for the population mean.

4 (8 pts). Suppose that a survey wants to construct a 90% confidence interval of the mean weekly exercise time for people in a city. The margin of error is to be no more than 5 minutes. Suppose the population standard deviation is 45 minutes. Determine how large the sample size should be.   5 (8 pts). Suppose that a polling company wants to construct a 95% confidence interval to estimate the percentage of customers who are satisfied with a bank. The company estimates that approximately 75% of the customers are satisfied. Suppose that the margin of error for the confidence interval is no more than 3%. Determine how large the sample size should be.

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.

A patient complains of temporary shading of the vision in one eye.  This symptom is called:

A sonographer switches to a higher frequency transducer.  What effect will that have on aliasing?