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1-?A scientist designed a medical test for a certain disease. Among 100 patients who have the disease, the test will show the presence of the disease in 96 cases out of 100, and will fail to show the presence of the disease in the remaining 4 cases out of 100. Among those who do not have the disease, the test will erroneously show the presence of the disease in 3 cases out of 100, and will show there is no disease in the remaining 97 cases out of 100. 2-?Part 1: A drug company is developing a new pregnancy-test kit for use on an outpatient basis. The company uses the pregnancy test on 100 women who are known to be pregnant for whom 95 test results are positive. The company uses test on 100 other women who are known to not be pregnant, of whom 99 test negative. a) What is the sensitivity of the test b) What is the specificity of the test Part 2: the company anticipates that of the women who will use the pregnancy-test kit, 10% will actually be pregnant. ?c) What is the PV+ (predictive value positive) of the test?
A jet plane traveling 1840 kilometer per hour (511 m/s) pulls out of a dive by moving in an arc of radius 5.40 kilometer, determine what is the planes acceleration
A plane accelerates from rest at a constant rate of 5.00 along a runway that is 1800 long. What percentage of the takeoff velocity did the plane gain when it reached the midpoint of the runway
q1. a simple harmonic oscillator consists of a block of mass 1.20 kg attached to a spring of spring constant 184 nm. as
A 280-kg piano slides 4.3 m down a 30o incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is 0.40.
An electron starting from rest get 6.3keV of KE in moving from point C to point D. Find the ratio of their speeds at the end of their respective trajectories
Point charges of 30.0 µC and 50.0 µC are placed 0.500 m apart. What is the magnitude and direction of the electric field halfway between them
Following the procedure in the video, create three traces of the pendulum motion of the cup. Compare the three traces for amplitude, wavelength, and frequency.
The lenses of a particular set of binoculars have a coating with index of refraction n = 1.38, and the glass itself has n = 1.52. what is the minimum thickness of the coating
A 1/2 in (inside) diameter garden hose is used to fill a round swimming pool 5.42 meter in diameter. Find how many days will it take to fill the pool to a depth of 1 meter
How many revolutions does the ball make during its fall. Now assume that the ramp is frictionless, so that the ball slides instead of rolling. Through what horizontal distance d does the ball move before landing in this case.
A ping-pong ball has been electrostatically charged such that it has 2.5 x 1015 excess electrons. The ball has a massof 1.0 g. It is observed to float motionless in the presence of auniform electric field. What is the magnitude and direction of th..
A sealed glass bottle at 27°C contains air at atmospheric pressure and has a volume of 30 mL. It is then tossed into an open fire. When the temperature of the air in the bottle reaches 200°C,
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