Distinguish between these parts of a wave: period, amplitude, wavelength, and frequency. (10 points) For full credits you should describe all four.

What is the current produced by a voltage of 240 V through a resistance of 0.2 Ω? (3.5 points)

a) Which has the greater resistance, a thick wire or a thin wire of the same length? (2.5 points)     b) Which has the greater electrical resistance, wet skin or dry skin? (2.5 points)

Make sure to type the whole statement.  

(You must type the whole statement.)

Now show your scratch paper (both front and back) to the camera on your computer. Do it slowly. After you show your paper, you can exit the exam.

When reading about a new over the counter flu test on the market it was deemed to have 80% sensitivity and 60% specificity.  Which of the following statements would best describe the validity of the new flu test (Select all that apply)?

You are looking to determine if there is a difference in the reported frequency of PA students and non PA students donating blood. You ask 50 PA students and 50 non PA students if they have donated blood in the past year. Which test should you run to answer your question?

You are planning on running a multiple linear regression for your analysis and you have the catagorical variable of year in school (1= freshamn, 2= sophmore 3= Junior and 4= Senior). How should this varible be included in the regression model?

  A researcher wants to see if the Oswestry Low Back Disability Index is a good predictor of the days a person is unable to work after sustaining a herniated disc in their lumbar spine.  In orthopedics the Oswestry is a patient reported outcome that determines the level of disability. Scores range from 0% – 100% (the higher the score indicates a higher level of disability).  Based on the output below, write a statement of the predictive value of the Oswestry for days unable to work. (Be sure to include the statistic (2 points)).  Additionally, write what the quality of the predictive value is (2 points).