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Suppose you want to decrease your margin of error by a factor of 6. By what factor do you need to increase your sample size? In other words, if you want to decrease your margin of error from 54% to 9%, by what factor do you need to increase your sample size?
What is the mean of the sample means? e. What is the shape of the population distribution? f. What is the shape of the distribution of the sample mean? How do I pay the $20.
How does bell-shaped curve for sampling distribution of sample means for samples of size n =120 compare tobell-shaped curve for sampling distribution of sample means for samples of size n =95?
sixty people will board a regional jet. the mean weight of the population is 150 pounds with a standard deviation of 30
It was suggested that five is the minimum number of data points for the least likely cate gory in constructing histograms. In many cases, however, we must estimate probabilities that are extremely small or for which relatively few data are availab..
A probability distribution is a mutually exclusive listing of the outcomes of an experiment which can occur by chance and the corresponding probabilities of occurrence.
Carry out the Wilcoxon rank sum test. State hypotheses and give the rank sum W for high- progress readers, its P-value, and your conclusion. Do the t and Wilcoxon tests lead you to different conclusions?
What is the probability that the sample proportion of grocery stores selling Haagen-Dazs ice-cream, will be within 0.01 of the population proportion?
A sample of 25 MBA students taking OTM course in the Spring of 2013 shows an average income of $85,000 with the sample standard deviation of $5,000. Find the 95% confidence interval of the population mean income of MBA students.
Based on the scale of measurement for each variable listed below, which measure of central tendency is most appropriate for describing the data? a. The time (in years) it takes a sample of students to graduate college.
For calendar year 1999, the data include the number of dealers, the average number of retail units sold per dealer, and the total revenue for the dealership group. Determine the regression equation estimating total revenue as a function of the num..
in a survey of 500 residents 300 were opossed to the use of the photo-cop for issuing traffic tickets. find a 95
a manufacturer has designed a process to produce pipes that are 10 feet long. the distribution of the pipe length
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