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Suppose that due to the cost of a survey, you must reduce your random sample from 100 to 64. Which of the following statements is true?
A) the margin of error for our 99% confidence interval would increase.
B) the margin of error for our 99% confidence interval would decrease.
C) the margin of error for our 99% confidence interval would stay the same since the level of confidence has not changed.
D) sigma would decrease
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Simplify a product of radical expressions. Assume that all variables represent positive real numbers
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The progress report of a research analyst to the supervisor stated: "All the estimated regression coefficients in our model with three predictor variables to predict sales are statistically significant.
John Kim is the purchasing manager for your computer, Inc., a manufacture of network servers. A truckload of sheet metal has just arrived. Previous experience with the supplier suggests that the thickness of the sheet metal follows a normal distri..
Can we conclude that there is a difference in number of citations written between the officers? Use the 0.05 level of significance.
Write down the differential equations which describe the probabilistic behavior of the unit in time as a Markov process.
It has been claimed that women live longer than men; however, men tend to be older than their wives. Ages of sixteen husbands and wives from England were obtained. The null hypothesis of equality of means is rejected. What conclusion can be made f..
Due to all the unceratinties in government health care legislation, shouldice would like to justify any expansion within a five-year time period. How would I set this problem up?
the mean gross annual incomes of certified welders are normally distributed with the mean of 20000 and a standard
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