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Dr. Ellis would like to study the association between age, drug use and crime among adult offenders using secondary data analysis. Describe how she might accomplish this by defining the variables she would use as the independent and dependent variables, what level of measurement the variables would need to be, the research and null hypotheses, and what sort of tests of association she might use.
Suppose that for X = net amount won or lost in a lottery game, the expected value is E(X) = -$0.50. What is the correct interpretation of this value?
where ?t? is the time in seconds after the balloon leaves the ground. How long will it take for the balloon to reach an altitude of 200 feet?
the function aa0e-0.00866x models the amount in pounds of a particular radioactive material remaining in a concrete
A boat leaves a dock at 2pm and travels due south at a speed of 20km/h. Another boast has been heading due east at 15km/h and reaches the same dock at 3. at what time were the two boats closest together?
the mean on the math 165 finl exam for math 165 last year was 80 with a standard deviation of 5. What is the cutoff score for a student to be in the top 12%?
Nate built a skateboard ramp that covers a horizontal distance of 10ft. The ramp rises a total of 3.5 ft. What angle does the ramp make with the ground? Round to the nearest degree.
Last year, nine employees of an electronics company retired. Their ages at retirement are listed below. Find the mean retirement age, to the nearest year.
The surface area S of a right prism is given by S = 2B + Ph. The length of a rectangle is five times its width. If the area of the rectangle is 500m², find its perimeter.
The probability that an individual is left-handed is 0.1. In a class of 30 students, what is the probability of finding at least five left-handers?
Consider a beam of length L and a fulcrum a length x away from one end. There are weights, W1 and W2, placed on opposite ends of the beam. Find x so that the system is in equilibrium.
Two pens and a pencil have a total length of 49 cm. Four pens and a pencil have a total length of 77cm. What is the total length of seven pens and a pencil?
A vat with length 6 meters, width 4 meters, and depth 3 meters is filled with water to a depth of 2 meters. Find the work required to pump all the water to the top of the vat. The weight density of water is 9810 N/m^3
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