Margin of error
Assume that the population standard deviation is 2 The margin of error for a 98% confidence interval is desired to be =/- 0.5inches.
What should be the sample size?
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A local real estate investor in Orlando is considering five alternative investments: a day spa, a theater, a restaurant, a motel, or a gift shop. Profits from the day spa, theater, gift shop or restaurant will be affected by the cost of gasoline;
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An agricultural researcher plants 100 plots with a new variety of yellow corn. Assume that the yield per acre for the new variety of yellow corn follows a normal distribution with unknown mean and standard deviation = 10 bushels per acre. If the a
Compute the weight percent of germanium that must be added to silicon to yield an alloy that contains 4.43 × 1021 Ge atoms per cubic centimeter.
Assume that the population standard deviation is 2 The margin of error for a 98% confidence interval is desired to be =/- 0.5inches. What should be the sample size?
Researchers are studying yield of a crop in ten locations. The researchers are going to compute independent 90% confidence intervals for the mean yield at each location.
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a) what is the velocity at the bottom of the pipe b) what is the velocity at the top of the pipe? c) if the pressure at the bottom is 30,000 psi, what is the pressure at the top?
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