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if x and y are two random variables with joint density function f(x,y)=4xy and =0 otherwise. find P(x> or = 1/2,y< or=1/2) and find the expected values of X and Y.
A teacher allows the students to each "throw out" their lowest test score in order to increase their overall grade. The original mean score of 5 tests is 72.8. After the removal of the lowest test, the mean score becomes 78.5. What is the score of..
Why must we always be mindful of the final value of the denominator in a rational expression? For example, consider the rational expression 3x/(x2 - 16). What values in the denominator must we be mindful of? Explain why.
Please note that all reactors can be operated each day but each can only be operated at one temperature on a given day. What would be the best fitting design for this situation? Why? Create the design matrix and give exact and specific instruction..
At the [I.CI level of significance, test the claim that the mean eight of women with Turner's syndrome is less than that of the general female population]
Find the present value of an annuity of $1500, at the end of each quarter for 8 years after being deferred for 7 years, if the money is worth an annual rate of 7.6% compounded quarterly.
Find a linear demand equation that shows the number of swords q that can be sold per week, if the price per sword is p dollars. You experimented with the prices, and found that if you charge $500 for a sword
Suppose CUNY professors have an average life, normally distributed, of 80 years with a population standard deviation of 9 years.
the perimeter of a playing field for a certain sport is 188 ft. the length is 46 ft longer than the width. find the dimensions.
A stone dropped in a still pond creates a circular ripple whose radius increases at a constant rate of 3 ft/s. At what rate is the area enclosed by the ripple increasing 8 s after the stone strikes the pond?
Assume that the pool's depth increases constantly between the shallow end and the deep end. How fast in the height of the water increasing when the water has filled 4 feet of the deep end?
Solving problem on distributive Laws
Solve the following system of equations 1, x+2y=2 -4x+3y=25
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