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Tests for tuberculosis like all other diagnostic tests are not perfect. QFT-G is one of such tests for tuberculosis. Suppose that for the population of adults that is taking the test, 5% have tuberculosis. The test correctly identifies 74.6% of the time adults with a tuberculosis and correctly identifies those without tuberculosis 76.53% of the time. Suppose that POS stands for the test gives a positive result and S means that the adult really has tuberculosis. What is the probability of an adult getting a POS result and truly NOT having tuberculosis?
General
2 months ago
State the empirical rule as specialized to variables.For any variable whose distribution ______ the following properties hold. Answer options: is triangular, is uniform, is bell shapedProperty 1:Approximately _____of all possible observations lie within one standard deviation to either side of the mean. Property 2: Approximately _____ of all possible observations lie with in two standard deviations to either side of the mean. Property 3: Approximately _____ of all possible observations lie within three standard deviations to either side of the mean. a. 89%, 99.7%, 100%, 75%, 95%, 68%b. 99.7%, 68%, 95%, 100%, 75%c. 95%, 99.7%, 100%, 68%, 89%
General
2 months ago
In order to determine if living next to high-voltage power lines increases your chance of getting cancer, researchers selected several homes at random, determined if they were within 50 yards of a high-voltage power line, and recorded if anyone in the home had cancer. They compared the proportion of cancer cases in homes within 50 yards of a high-voltage power line with the proportion of cancer cases in homes more than 50 yards from a high-voltage power line. This is a. An observational studyb. An experiment, but not a double -blind experimentc. a matched pairs experiment
General
2 months ago
If the vertex of a parabola is (3,11) and another point on the curve is (2,7),what is the coefficient of the squared expression in the parabola's equation?
General
2 months ago
Patty has just completed her second semester in college. She earned a grade of B in her 4-hour topology course, a grade of D in her 11-hour government course, a grade of D in her 2-hour biology course, and a grade of D in her 3-hour studio art course. Assuming that A equals 4 points, B equals 3 points, C equals 2points, D equals 1 point, and F is worth no points, determine Patty's grade-point average for the semester.
General
2 months ago
Which graph represents the function y = 2x – 4? A coordinate plane with a line passing through (negative 4, 0) and (0, 2). A coordinate plane with a line passing through (0, negative 4) and (4, negative 2). A coordinate plane with a line passing through (0, negative 4) and (2, 0). A coordinate plane with a line passing through (negative 4, 0) and (negative 2, 4).
General
2 months ago
The equation shows a chemical reaction using 64 grams of calcium, 162 grams of zinc carbonate, and 152 grams of calcium carbonate.calcium + zinc carbonate → calcium carbonate + zincAccording to the law of conservation of matter, how much zinc is present in the product?Group of answer choices98 grams64 grams74 grams88 gramsFlag this QuestionQuestion 64.5 ptsTim dissolves 0.5 grams (g) of sugar in a beaker containing 50.0 g of water, as shown below.What is the mass of the solution?Group of answer choices45.5 g50.0 g50.5 g25.0 gFlag this QuestionQuestion 74.5 ptsIn her chemistry class, Carmen performed an experiment that involved a chemical reaction. She measured the total mass of the reactants she used in her experiment using a triple-beam balance. The measurement she obtained is illustrated below.ImageAccording to the law of conservation of mass, what was the mass of the products in her experiment?Group of answer choices342 g240 g243 g300 g
General
2 months ago
What is the best definition of marginal cost?the possible income from producing an additional itemthe price of producing one additional unit of a goodthe additional income gained from selling an additional goodthe financial gain from business activity minus expenses
General
2 months ago
Which of the following are solutions to the Quadratic Equation? Check all that apply.x^2+8x+16=7A. sqrt7 - 4B. -4C. sqrt7D. 4E. sqrt7 + 4F. sqrt7 - 4
General
2 months ago
Select the correct answer from each drop-down menu.4 units6 units4 units6 units4 units irThe total area of the three triangles is square units.The area of the figure is square units.
General
2 months ago
allen is mixing red and yellow paint to make two different shades of orange. to make 1 cup of dark orange paint he needs 7 ounces of red paint and 1 ounce of yellow paint. To make 2 cups of light orange paint he needs 13 ounces of yellow paint and 3 ounces of red paint. Allen decides to make 3 cups of dark orange paint and 3 cups of light orange paint. How many ounces of yellow paint does he need
General
2 months ago
Determine the present value P you must invest to have the future value A at simple interest rate r after time t.A = $14 comma 00014,000, r = 5.55.5%, t = 55 yearsEquation : A=p(1+rt)
General
2 months ago
Jamal is comparing his transportation options for an upcoming trip. He’s considering a rental car and a taxi service. Based on his planned routes during his trip, he expects a taxi service would cost about $128. Jamal could also get a rental car for a daily rate and unlimited miles. If Jamal’s trip will last 4 days and he expects to pay about $24 for gas, which graph shows the range of car rental rates that would be cheaper than the taxi service?
General
2 months ago
Short-term classes: Does taking a class in a short-term format (8 weeks instead of 16 weeks) increase a student’s likelihood of passing the course? For a particular course, the pass rate for the 16-week format is 59%. A team of faculty examine student data from 40 randomly selected accelerated classes and determine that the pass rate is 78%. Which of the following are the appropriate null and alternative hypotheses for this research question?a.H0: p = 0.59; Ha: p ≠ 0.59b.H0: p = 0.59; Ha: p > 0.59c.H0: p = 0.78; Ha: p ≠ 0.78d.H0: p = 0.78; Ha: p > 0.59
General
2 months ago
A company specializes in custom home resales in an exclusive subdivision. A random sample of nine custom homes currently listed for sale provided the following information on size and price. Here, x denotes size, in hundreds of square feet, rounded to the nearest hundred, and y denotes price, in thousands of dollars, rounded to the nearest thousand. Use the information to complete parts (a) through (g). x 26 27 33 29 29 34 30 40 22y 540 555 575 577 606 661 738 804 496a. Find the regression equation for the data points.b. Graph the regression equation and the data points.c. Describe the apparent relationship between the two variables under consideration.d. Interpret the slope of the regression line.e. Identify the predictor and response variables.f. Identify outliners and potential influential observations.g. Predict the values of the response variable for the specified values of the predictor variable, and interpret your results.
General
2 months ago
Help me plsssssssszzzzzzzzzzzzzzzzz
General
2 months ago
The height of a fountain’s water stream can be modeled by a quadratic function. Suppose the water from a jet reaches a maximum height of 8 feet at a distance 1 foot away from the jet. If the water lands 3 feet away from the jet, find a quadratic function that models the height h(d) of the water at any given distance d feet from the jet.
General
2 months ago
A company that makes fleece clothing uses fleece produced from two farms, Northern Farm and Western Farm. Let the random variable X represent the weight of fleece produced by a sheep from Northern Farm. The distribution of X has a mean 14.1 pounds and a standard deviation 1.3 pounds. Let the random variable Y represent the weight of fleece produced by a sheep from Western Farm. The distribution of Y has a mean 6.7 pounds and a standard deviation of 0.5 pounds. Assume X and Y are independent. Let W equal the total weight of fleece from 10 randomly selected sheep from Northern Farm and 15 randomly selected sheep from Western Farm. Which of the following is the standard deviation, in pounds, of W?A) 1.3+0.5B) sqrt(1.3^2+0.5^2)C) sqrt(10(1.3)^2+15(0.5)^2)D) sqrt(10^2(1.3)^2+15^2(0.5)^2)E) sqrt((1.3)^2/10 + (0.5)^2/15
General
2 months ago
How Can you describe angles formed by parallel lines and transversal? I need answer pleaseeee
General
2 months ago
Mrs. Perez drove 33.75 miles in 3/4of an hour. What was the speed in miles per hour if this situation is represented by the equation d=rt?
General
2 months ago
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