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Impurities in the batch of final product of a chemical process often reflect a serious problem. From considerable plant data gathered, it is known that the proportion Y of impurities in a batch has a density function given by
(a) Verify that the above is a valid density function.
(b) A batch is considered not sellable and then not acceptable if the percentage of impurities exceeds 60%. With the current quality of the process, what is the percentage of batches that are not acceptable?
A. What is the coefficient of determination? B. What is the correlation coefficient? C. What is the sampl mean of Y?
Suppose a restaurant business succeeds 60% of the time. Suppose that there are three such restaurants open in your city. When they don't compete with one another, it is reasonable to believe that their relative success would be independent.
Why do we use graphical displays of the data from our research, such as Pareto Charts, Bar Charts, Pie Charts, Flow Charts, or Process Control Charts?
Draw the histogram for these data using an initial class boundary of 29.5 and a class width of 6. Note that you can add or remove classes from the figure
This table gives three measurements of 10 samples made in a production run. Use statistical process control method to solve problem.
An economist is interested in studying the incomes of consumers in a particular region. The population standard deviation is know to be $1,000. A random sample of 50 individuals resulted in an average income of $15,000.
What are the differences among a proportion, a percentage, and a ratio? When would a researcher use a hypothesis test for the difference in two population proportions? Explain.
Identify the independent and dependent variable, and state the research hypothesis for your study. The variables must be categorical variables.
Find the power of the test designed to determine if the the new safety equipment is effective when the mean percent reduction is actually 2.3%. Assume that the population standard deviation is 12% and that α is 0.02. What is the power?
Suppose that the mean amount wagered by all patrons is $287 with a standard deviation of $15. You should give free accomodations to those individuals who wager over how much money?
Determine the rejection region for the test of Ho: (mean 1 - mean 2) > 2.43 Use a = 0.04. z >
q1. use maslows hierarchy of needs to discuss the extent to which growth needs influence personality formation.q2.
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