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Find an experiment. You can find the latest medical research in the Journal of the American Medical Association at www.jama.ama-assn.org and the New England Journal of Medicine at www.nejm.org. Many of the articles describe randomized comparative experiments and use the language of statistical significance when giving conclusions. Look through the abstracts and find an experiment of interest to you. If your institution has a subscription to these journals, you should be able to view the entire article. Otherwise, use the information in the abstract to answer as many of these questions as you can. What was the purpose of the experiment? How many factors were in the experiment, and what were the levels of the factors? What response(s) were measured? How many subjects were assigned to each of the treatments, and was randomization used? Was it a double-blind experiment? What were the conclusions, and were the results statistically significant?
A block with mass m = 16.0 kg rests on a frictionless table, What distance does the spring need to be compressed so that the block will just barely make it past the rough patch when released
A 0.145 kg baseball pitched at 39.0 m/s is hit on a horizontalline drive straight back toward the pitcher at 52.0 m/s. calculate the average force between the bat and ball during contest
When a potential difference of 12V is applied to a wire 6.6m long and 0.35mm in diameter the result is an electric current of 2.1A
A car and driver have a combined mass of 100 kg. What is the force of the hill on the car as it passes over the top
A charged belt, 43 cm wide, travels at 26 m/s between a source of charge and a sphere. The belt carries charge into the sphere at a rate corresponding to 81 µA. Compute the surface charge density on the belt.
series circuit contains a resistor and one unknown element, which could be a resistor, a capacitor, or an inductor. What is the second element
You measure an electric field of 1.25×106N/C at a distance of 0.158m from a point charge. What is the electric flux through the surface of a sphere
A bunch of grapes is placed in a spring scale at a supermarket. The grapes oscillate up and down with a period of 0.64s, What is the mass of the grapes
An object with a height of 2.92 cm is placed 36.8 mm to the left of a lens with a focal length of 35.0 mm. What is the height of the image
a common he-ne laser emits light of wavelength 633 nm with a bandwidth of 1.00 x 108 hz. find the uncertainty in energy
An object is 19 centimeter in front of a diverging lens that has a focal length of -9 centimeter. Evaluate how far in front of the lens should the object be located
A car is moving on a flat horizontal circular track of radius 120 m. The speed of the car is constant, 15m/s. The mass of the car is 1200 kg. What force is keeping the car in the circle
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