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Construct a probability plot that will allow you to assess the plausibility of the lognormal distribution as a model for the rainfall data of Exercise 83 in Chapter 1
Exercise 83. Consider numerical observations x1,..., xn. It is frequently of interest to know whether the xi s are (at least approximately) symmetrically distributed about some value. If n is at least moderat ely large, the extent of symmetry can be assessed from a stem-and-leaf display or histogram. However, if n is not very large, such pictures are not particularly informative. Consider the following alternative. Let y1 denote the smallest xi, y2 the second smallest xi, and so on. Then plot the following pairs as points on a two-dimensional coordinate system:
a. What does this plot look like when there is perfectsymmetry in the data? What does it look like when observations stretch out more above the median thanbelow it (a long upper tail)?
Recognize the given samples are independent samples or matched pairs.
Calculate the correlation coefficient. What is the coefficient of determination from these sample statistics? What does this coefficient indicate?
What are the maximum and the minimum values in the entire set of data? List the actual values in the fourth row. List the actual values in the next to the last row.
a research study has stated that the taxes paid by individuals is correlated at a .78 value with the age of the
What should the average weight be if the production manager wants no more than 6% of the products to weigh more than 7.4 ounces?
an examination of rejects shows at least 7 problems. a frequency tally of the problems follows. construct a pareto
In using the data from study A to make predictions, what percent of the time would you expect predictions to be exactly correct?
Research by the Illinois Banking Company revealed that only 10 percent of their customers wait more than five minutes to do their banking. Management considers this reasonable and will not add more tellers unless the proportion becomes larger than..
Determine and interpret the p-value for the test. Construct and interpret the 99% confidence interval for the test.
A random sample of 14 days shows Xbar = $502.95 and s = $64.00. You can assume normality. Using alpha = 4%, is the sampling result significant? Explain.
suppose a study of 196 randomly sampled privately insured adults with incomes over 200 of the current poverty level is
A distribution of exam scores has a mean of µ 5 78. If your score is X = 70, which standard deviation would give you a better grade: s =4 or s = 8?
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