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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 Federation starship ( 2.10×106kgkg ) uses its tractor beam to pull a shuttlecraft ( 2.10×104kgkg ) aboard from a distance of 15.0kmkm away. The tractor beam exerts a constant force of 4.0×104N4.0 \times 10^{4}\;{\rm N} on the shuttlecraft. Both spa..
A flywheel in the shape of a solid cylinder of radius R=0.60 meter and mass M=15 kilogram can be brought to an angular speed of 12 rad/s in 0.60 second by a motor exerting a constant torque. Find what percentage of the power generated by the motor ..
Before beginning a long trip on a hot day, a driver inflates an automobile tire to a gauge pressure of 1.8 atm at 282K. calculate its temperature at the end of the trip
A weightlifter bench-presses a 130.0 kg barbell from his chest to a height equal the length of his arms 0.850 m. How much work does he do
An inductor is connected to an AC power supply having a maximum output voltage of 7.00 Volt at a frequency of 380 Hertz. Compute what inductance is needed to keep the rms current less than 2.50 mA
A 10 kilogram block is set in motion up a 20o inclined plane with an initial speed of 8.0 m/s. Find the change in gravitational potential energy of the block
a dog wishes to swim across a slow moving stream. the dog can swim at 2.0ms in calm water. the current velocity is
The critical angle for an air-glass interface is 65.3degrees. When a light ray and air is incident on this interface, the reflected ray is 100% polarized. What is the angle of refraction of that ray
An ideal transformer has 50 turns in its primary and 400 turns in its secondary. 8.0- ac is connected to the primary. What is the power supplied to the primary
The current in a series circuit is 24.0 A. When an additional 25.0 ohm resistor is inserted in series, the current drops to 13.8 A, What is the resistance in the original circuit
An rms voltage of 19.5V with a frequency of 1.50kHz is applied to a 0.365μF capacitor. What is the rms current in this circuit? By what factor does the current change if the frequency of the voltage is doubled?
Train cars are coupled together by being bumped into one another. Compute what is their final velocity
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