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Can low-fat food labels lead to obesity? What are the effects of low-fat food labels on food consumption? Do people eat more of a snack food when the food is labeled as low-fat? The answer may depend both on whether the snack food is labeled low-fat and whether the label includes serving-size information. An experiment investigated this question using university staff, graduate students, and undergraduate students at a large university as subjects. Subjects were asked to evaluate a pilot episode for an upcoming TV show in a theater on campus and were given a cold 24-ounce bottle of water and a bag of granola from a respected campus restaurant called The Spice Box. They were told to enjoy as much or as little of the granola as they wanted. Depending on the condition randomly assigned to the subjects, the granola was labeled as either "Regular Rocky Mountain Granola" or "Low-Fat Rocky Mountain Granola." Below this, the label indicated "Contains 1 Serving," or "Contains 2 Servings," or it provided no serving-size information.21 Twenty subjects are assigned to each treatment, and their granola bags were weighed at the end of the session to determine how much granola was eaten.
(a) What are the factors and the treatments? How many subjects does the experiment require?
(b) Outline a completely randomized design for this experiment. (You need not actually do the randomization.)
A cord is attached to a cart that can slide along a frictionless horizontal rail aligned along an x-axis. The left end of the cord is pulled over a pulley, a negligible mass and friction and at cord height h [m], so the car slides from x1 to x2. Duri..
A mirror with a focal length 25 centimeter has a 4 centimeter tall object located 100 centimeter in front of it. Determine what is the height of the image
Two balls of equal mass (0.70kg) approach the origin along the positive x- and y-axes at the same speed (3.6m/s). What is the magnitude of the total momentum of the system
Drawing on Erastothenes' method, if two observers are due north and south of each other and are separated by 490 km, what is the circumference of their spherical world if they see the same star on their meridian at altitudes of 29 degrees and 45 degr..
A football is kicked at ground level with a speed of 15.0 m/sat an angle of 40.0 to the playing field (horizontal). How much later does it hit the ground
A motorcycle has a constant speed of 25.0 m/s as it passes over the top of a hill whose radius of curvature is 118 m, Find the centripetal force that acts on the cycle
What is an index of refraction of the liquid
A large capacitance of 2.00 mF is needed for a certain application. What is the maximum voltage that can be applied
An airplane pilot wishes to fly to his destination 500 mi due west, but the wind is blowing at 35.3 mi/hr toward 10.7° north of west. what will be the speed of the plane relative to the ground
What is the difference between series and parallel circuits? Specify in wordsand algebraic formula, if possible, the relationships between current, voltage, and resistance in each type of circuit.
A sphere encloses a total of 1 uc of charge. What is the electric flux during the surface of sphere? What would be the electric flux during the surface of the sphere if you doubled the radius of sphere (total charge inside stays the same.
In a certain reference frame, there is a uniform electric field E=[0,0,E], where E = 100 N/C and no magnetic field. What is the direction and magnitude of the electric field E' in a frame moving with speed v=(3/5)^c in the +x direction? Is there a ma..
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