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A mixed group: means. A group of 20 children at a nursery school are exposed to whooping cough by playing with an infected child. Of these children 17 have been vaccinated and 3 have not.
(a) What is the distribution of the number of new infections among the 17 vaccinated children? What is the mean number of new infections?
(b) What is the distribution of the number of new infections among the 3 unvaccinated children? What is the mean number of new infections?
(c) Add your means from parts (a) and (b). This is the mean number of new infections among all 20 exposed children.
Find the accumulated amount A if the principal P is invested at the interest rate of r/year for t years.
The residuals plot indicated that a linear model is appropriate. Write a sentence summarizing what R2 says about this regression.
Find the equation of the circle which is a reflection of C in the y-axis
British sterling silver should be used to prepare 200grams of a copper-silver alloy that is 10% copper by weight? (round to the nearest tenth)
total interest from investments was $3060. the interest from the first investment was 2 times the interest from the second. find the amounts of the three part investment.
Relative to polar coordinates, the position vector of an object moving in the plane can be written as r (t) = r(t)er. Verify that the velocity vector is v(t) = (dr/dt) er + r (dθ/dt)] eθ.
A cord can bear a maximum force of 100 N without breaking. A body of mass 1 kg tied to one end of a cord of length 1 m is revolved in a horizontal plane. What is the maximum linear speed of the body so that the cord does not break?
what is the maximum length of the triangular flags, if they want to use a maximum of 180 square inches of cloth?
Norman window has the shape of a semicircle atop a rectangle so that the diameter of the semicircle is equal to the width of the rectangle. What is the area of the largest possible Norman window with a perimeter of 39 feet?
Define a vector field as and define the path C as the path graphed below lying in the x-y plane starting at x point (x,y,z) = (-2,0,0) and ending a (4,2,0).
The perimeter of a swimming pool is 91m. The width is 5m more than half the length of the pool. Find the length and width of the pool.
a bug is going 2m/ minutes along the diagonal of a terrarium,indicated in the figure in the overview.The terrarium is mounted on a cart going at 6 meters/minutes. What is the speed of the bug relative to the ground.
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