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A standard screening test for Down's syndrome is based on a combination of maternal age and the level of serum alpha-feroprotein. Using this test 80% of Down's syndrome cases can be identified at birth, while 5% of normals are detected as positive.
a. What is the sensitivity and specificity of the test?
b. Assume that 1/500 births have this genetic condition. What is the percentage of births who test positive using this test will actually have the condition?
if a patient weighing 70kg requires 210mg of this medicine, then what is the amount of medicine requires for a patient weighing 80kg?
A man rows a boat 550 feet upstream against a constant current in 10 minutes. He then rows 325 feet downstream (with the same current) in 5 minutes. Find the speed of the current and the equivalent rate at which he can row in still water.
Evaluate whether the given sets of vectors form a basis or not.
From the top of a 300 ft lighthouse, the angle of depression to a ship in the ocean is 23°. How far is the ship from the base of the lighthouse? Round your answer to the nearest foot.
The lifetime of an automatic transmission produced by the BW Company is normally distributed with a mean of 100,000 miles and a standard deviation of 20,000 miles.
Determine convergent or divergence. SUM from n=0 to infinity for
In a pie graph, if pepperoni pizza were 24/72 of the distribution, how many degrees would be needed to represent pepperoni?
twenty business majors and 18 economics majors go bowling. each student bowls one game. the scorekeeper announces that
A region of a certain solid consists of a square and a semicircle with a circular hole. Find the area of the given region. side of square is 9 in. and the radius is 2.5 in.
A twin engined aircraft can fly 1520 miles from city A to city B in 5 hours with the wind and make the return trip in 8 hours against the wind. What is the speed of the wind?
who were over age 18 was approximately 2.28 x ?10?^8 people if the national debt were evently didvided among every person over age 18 in the country how much debt would be assigned to each individual? Round to three significant digits.
Find the marginal pmfs of X and Y, explore if X and Y are independent and find the conditional pmf of Y given that 3 eggs among the six selected are cracked. What is the probability that X 1?
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