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Near the time of an election, a cable news service performs an opinion poll of 500 probable voters. It shows that the Republican contender has an advantage of 52% to 48%.a.Develop a 95% confidence interval for the proportion favoring the Republican candidate. (Round your answers to 3 decimal places.)b.Estimate the probability that the Democratic candidate is actually leading. (Round your answer to 4 decimal places.)c.Repeat the above analysis based on a sample of 4,500 probable voters. (Round your interval to 3 decimal places and Probability to 4 decimal places.)
question 1nbsp calculating a z-score and graphing a box plotnbsplook at the data under dietarysupp.nbsp the table gives
Descriptive statistics (5-number summary, mean, mode, range and standard deviation) for each of the four variables along with an explanation of what the descriptive statistics tell us about the motion picture industry.
Develop a regression model and complete appropriate analysis of the three largest U.S. Air carriers
Which of the approaches will you be most inclined to choose and why?
1. eithernbsp find a newspaper tv radio or web article that reports some scientific study or statistical analysis of
Assume that you work for a chain of food stores and that you are interested in how your company's prices compare with your competitors. Since a food store carries many items, it is likely that you are higher on some products than on others. T..
the following data are availableresp nbspnbsp age nbspnbspnbsp exam nbsp papernbspnbsp sex nbspnbspnbspnbsp
Based on the information provided for this hypothesis test, what decision should you come to? (Assume that the population is normally distributed.)
There is some evidence that, in the years 1981-1985, a simple name change resulted in a short-term increase in the price of certain business firms' stocks (relative to the prices of similar stocks). (See D. Horsky and P. Swyngedouw,..
a)Show the scatterplot for this data with the least squares regression line. Find R^2. HOw much of the variation is explained by the regression line? b)Experiment with the non-linear regressions available on the calculator. Which seem to fit? S..
Five balls are distributed between two urns
1) A coin is flipped 14 times. Use the normal approximation to the binomial distribution to calculate the probability of a total of 4,5, or 6 heads. Compare this to the binomial probability.
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