Find the marginal densities
Suppose X and Y have joint density f(x,y) = 10x^2y when 0 < y < x < 1.
a) Find the marginal densities of X and Y and the,
b) Conditional density of Y given X = x
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Jude is interested in buying a digital camera. He visited 9 stores at random and recorded the price of the particular phone he wants. The sample of prices had a mean of 350.22 and a standard deviation of 26.17.
The university has four colleges-business, humanities, fine arts,and engineering and quantitative methods-and a law school.Each of these units has a dean who is responsible to the academicvice president. Each college has several departments.
1. A random sample of 16 size D batteries for cars yield a mean of 2.8 hours with standard deviation, 1.3 hours. (a) Find the critical value, t*, for a 99% CI. t* =
The positron is a particle with the same mass as an electron but charge +e. A positron in a bubble chamber moves perpendicular to a 3.4T magnetic field. a) If the positron's kinetic energy is 27eV , what's the radius of its trajectory in the bubbl
Suppose X and Y have joint density f(x,y) = 10x^2y when 0 < y < x < 1. a) Find the marginal densities of X and Y and the,
An agricultural field trial compares the yield of two varieties of corn. The researchers divide in half each of 14 fields of land in different locations and plant each corn variety in one half of each plot.
During the current year, Yellow Company had operating incomeof $380,000 adn operating expenses of $300,000 . In addition,Yellow had a long-term capital loss of $50,000 .
Future Electronics makes CD Players. Its research department found that the life of the laser beam device is normally distributed, with mean 5000 hours and standard deviation 450 hours.
A child slides down a slide with a 29o degree incline, and at the bottom her speed is precisely one-fourth what it would have been if the slide had been frictionless. Calculate the coefficient of kinetic friction between the slide and the child.
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