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1. What are the advantages and disadvantages of using variables rather than attributes in control charts?
2. Describe the use of the Pareto concept in the selection of characteristics for control charts.
3. Discuss the preliminary decisions that must be made before you construct a control chart. What concepts should be followed when selecting rational samples?
list some of the risks in using samples to make inferences about populations from which the samples were drawn. what
a random sample of size 100 is taken from an infinite population having the mean mu76 and the standard deviation
Based on the team's claims about waiting time, what is the probability that a sample mean for n = 25 people would be as large or larger than 4.2 minutes? What should the manager conclude based on these data?
A vending machine that dispenses coffee into cups must fill the cups with 7.8oz of liquid. Before selling the vending machine to a college or business, the company tests the machine to be sure it is dispensing an average amount of 7.8oz of coffee.
suppose a point xy is chosen at random from the disk x2 y2 is less than and equal to 1. find the a marginal density of
what is the formula for the standard error of the sample distribution when we know the population standard
a bottling company produces bottles that hold 12 ounces of liquid. periodically the company gets complaints that their
The Artist's Palette sells high-end art supplies to the art students at three regional art and design schools in Philadelphia, Washington, D.C., and Baltimore.
Researchers must obtain Informed Consent from all human participants in a research study. Informed Consent requires that participants are informed of the following (check all that apply):
1. a random variable has possible values of 20 21 22 23 and 24 that are equally likely to occur.a what is the
If you use regular book as the reference category and another analyst uses, say, Kindle as the reference category, will you get the same regression results? Explain.
A similar survey of 37,000 adults in the US in 1966 found that 43% of adults were current smokers. Construct a 95% confidence interval for the difference between proportions of current smokers in 1991 and 1965.
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