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1. In a current election campaign, PSI has just found that 220 registered voters, out of 500 contacted, favor a particular candidate.
a. What's the 95% confidence interval estimate for the proportion of the population of registered voters that favor the candidate?
b. Suppose that PSI would like a .99 probability that the sample proportion is within + .03 of the population proportion. How large a sample size is needed to meet the required precision? (A previous sample of similar units yielded .44 for the sample proportion.)
The temperature of a plate at the point (x,y) is given by T(x,y) = 300+ 3x^2 -2y^2. A heat hating ant is located at the point (3,2).
given a circle with an inscribed equilateral triangle with each side of the triangle having a measurement of 18cm. what
A small business buys a computer for $3700. After 4 years the value of the computer is expected to be $200. For accounting purposes the business uses linear depreciation to assess the value of the computer at a given time.
a student used a 500-ml graduated cylinder to measure the volume of water in a 1 -cup measure. three trials of the
Do the data indicate a significant difference in average off-schedule lime? Use a 5 percent level of significance.
Determine which ordered pair is a solution of the system -2x - y^2 = 4 -3x + y = 10
how long will it take your money to triple if you originally invested $10,000 at 5.6% compounded annually?
The sum of all of the sides of a stop sign is 96 inches. A stop sign is an octagon with all sides equal. How many inches does each side measure?
four men each tell the truth independently with probability1/3. D makes a statement which C reports to B, and B then reports C's statement to A. If A asserts that B denies that D is a liar, what is the probability that D spoke the truth?
Suppose the demand curve for a monopolist is QD = 500 - P, and the marginal revenue function is MR = 500 - 2Q. The monopolist has a constant marginal and average total of $50 per unit.
jack spent $20 at the store. He bought 4 pens and a calculator for $10. what was the cost per pen?
A 30cm pendulum traverses an arc of 15 cm. To the nearest degree, how many degrees of rotation did the pendulum swing?
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