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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.
a 1950-kg car experiences a combined force of air resistance and friction that has the same magnitude whether the car
You select a rental package that includes a car with an average consumption of 6rm liters of fuel per 100 rm km. Considering that in Europe average fuel cost is 1.063 rm euros/ liter, how much (in US dollars) will you spend in fuel in your trip.
An electron is accelerated by a uniform electric field (1600 V/m) pointing vertically upward. Use Newton's laws to obtain the value of electron's velocity
A 52.0 skateboarder wants to just make it to the upper edge of a "quarter pipe," a track that is one-quarter of a circle with a radius of 2.90. What speed does he need at the bottom.
A hand-pumped water gun is held level at a height of 0.65 m above the ground and fired. Find the gauge pressure of the water gun's reservoir at the instant when the gun is fired
When incident and reflected waves overlap, interference may be (leading to a large wave motion) or (leading to a smaller wave motion).
A 1.9 kilogram mass is attached to a spring with a force constant of 59 N/m. find its speed when it is halfway to the equilibrium position
A passenger on a moving train walks at a speed of 1.40 m/s due north relative to the train. What are the magnitude and direction of the velocity of the train relative to the ground
A child is twirling a 0.0148-kg ball on a string in ahorizontal circle whose radius is 0.143 m. The ball travels oncearound the circle in 0.402 s.
A storage tank 23 m high is filled with pure water. (Assume the tank is open and exposed to the atmosphere at the top.), Find the gauge pressure at the bottom of the tank
A small weight hangs from a string attached to the rearview mirror of a car accelerating at the rate of 1.17 m/s2. What angle does the string make with the vertical
a rocket is moving through empty space in a straight line with constant speed. it is far from gravitational effect of
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