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Problem: The Pew Research Center survey asked a random sample of 1500 adults, "Do you think the use of marijuana should be made legal, or not?" In the entire sample, 41% said, "Yes, legal." But only 24% of the Republicans in the sample said, "Yes, legal." Which of these two sample percents will be more accurate as an estimate of the truth about the population?
(i) The result for Republicans is more accurate because it is easier to estimate a proportion for a smaller group.
(ii) The result for the entire sample is more accurate because it comes from a larger sample.
(iii) Both are equally accurate because both come from the same sample.
If particles 2 and 3, even though not rigidly bound together, are regarded as forming a composite body of mass 2m located at their mid-point r = (1/2)*(r_2 + r_3), find the equations describing the motion of the two-body system comprising particle..
A converging lens (f1 = 24.0 cm) is located 56.0 cm to the left of a diverging lens (f2 = -28.0 cm). How far is the object from the converging lens
a diffraction grating 1.5 mm wide produces the fifth order pie/4 with light wavelength 650nm on the screen 80 mm away. What is the angle of the third order inside the water casing
perform the following experiment the purpose of this experiment is to use a compass to detect the weak magnetic field
Find out the speed of the satellite
How hard does the person have to pull to keep the block moving with constant velocity? Is this easier or harder than pulling horizontally?
A 60 kilogram water skier is being pulled by a nylon (Young's modulus 3.7 x 109 N/m2) tow rope that is attached to a boat. Find the change in length of the rope when the skier has an acceleration whose magnitude is 0.72 m/s2
Early in the morning, when the temperature is 5.0°C, gasoline is pumped into a car's 45 L steel gas tank until it is filled to the top. How much gasoline spills out in this case
Why did you have such a large percent difference in the resistance of the lamp filament with the two different applied voltages? What physical condition of a conductor must remain constant for Ohm's law to apply?
Suppose that the amount of heat removed when 1.6 kg of water freezes at 0.0 oC were removed from ethyl alcohol at its freezing/melting point of -114.4 oC. How many kilograms of ethyl alcohol would freeze?
A record turntable rotates through 5.0 rad in 2.8 s as it is accelerated uniformly from rest. What is the angular velocity at the end of that time
A refracting telescope has an angular magnification of -92.00. The length of the barrel is 1.100 m. What are the focal lengths of the objective
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