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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 75kg hiker climbs to the top of a 4100m -high mountain. The climb is made in 5.0h starting at an elevation of 3000m, Calculate the work done by the hiker against gravity
A series RC circuit with C = 48 µF and R = 6.4 ohm has a 24 V source in it. what is the charge on the capacitor
Find what is the minimum work needed to push a 950 kilogram car 810 meter up along a 9 degree incline
Then, a thin conducting wire connects the spheres, redistributing the charge on each sphere. When the wire is removed the spheres still repel but with a force of F2 = 0.100 N. Using this information, find the initial charge on each sphere, q1 and ..
Now, a second resistor R2 of 3.2x10^5 ? is connected in parallel to the existing resistor in the circuit, and a second capacitor C2 = 4.20 µF is connected to the existing capacitor in parallel. What will be the new time constant
Starting from rest, a boulder rolls down a hill with constant acceleration and travels 3.00m during the first second. how FAR does it travel during the second second
A solid piece of lead has a mass of 29.18 g and a volume of 2.60 cm3. From these data, calculate the density of lead
8 lights are connected in parallel to a 110 V source by two long leads of total resistance 1.6 ohms. what fraction of the total power is wasted in the leads
A rock is suspended by a light string. When the rock is in air, the tension in the string is 39.1 N. What is the density of the unknown liquid
As the driver steps on the gas pedal, a car of mass 1 180 kg accelerates from rest. What is the minimum average power output of the engine over this time interval
A fullback with a mass of 101 kilogram and a velocity of 5.2 meter per second due west collides head-on with a defensive back with a mass of 93 kilogram and a velocity of 4.9 meter per second due east. Obtain the initial momentum of each player
You have a fish tank of 20.00 cm radius filled with water (n =1.33). Your pet goldfish is swimming 10.0 cm from the closest part of the tank form you. Calculate and describe the image your fish sees
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