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A manufacturer of boxes of candy is concerned about the proportion of imperfect boxes - those containing cracked, broken or otherwise damaged candies.
(a) How large a sample is needed to be 99% confident that the difference between the sample fraction of imperfect boxes and the population proportion of imperfect boxes is no more than .015? Assume here that we have absolutely no information concerning the true population of imperfect boxes.
(b) How does your answer to part (a) change if we assume that the population proportion of imperfect boxes is at least .005 and no more than .1?
What is the probability that the average section in the sample can withstand an earthquake measuring at least 3.6 on the Richter scale?
You are going to play mini golf. A ball machine that contains 20 green golf balls, 20 red golf balls, 22 blue golf balls, and 25 yellow golf balls, randomly gives you your ball. What is the probability that you end up with a yellow golf ball?
Calculate the mean, median, mode, range, and standard deviation of the adjusted daily closing price for this stock. Interpret these statistics and discuss their relevance. Is the mode useful? Why or why not - Conduct a hypothesis test to see if the..
Who owns iPods? As part of the Pew Internet and American Life Project, researchers surveyed a random sample of 800 teens and a separate random sample of 400.
What should the market price of this stock today if investors' required rate of return is 13%.
The relationship can be represented by the multiple regression equation y-hat = 250 + 1.5x1 + 80x2. Predict the SAT verbal score of a student whose IQ is 103 and grade point average is 3.7.
In their data, the lowest family income reported in this group was $65,100 annually, and the highest family income reported was $103,400 annually.
find the number of possible 4-letter sequences (words) where the same letter can appear in the word more than once.
Use the following data in MS Excel to construct a scatter graph and then fit a regression line to the data.
Use Appendix F below to locate the value of t under the following conditions. The sample size is 15 and the level of confidence is 95 percent.
Is the bottled water you drink safe? It has been suggested that about 10% of all bottled water violates at least one government standard.
Suppose 10 studies were done to assess the relationship between watching violence on television and subsequent violent behavior in children.
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