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A chemical engineer is in charge of a particular process at an oil refinery. Past experience indicates that 10% of all shutdowns are due to equipment failure alone, 5% are due to a combination of equipment failure and operator error, and 40% involve operator error. A shutdown occurs. Find the probability that
(a) equipment failure or operator error is involved
(b) operator error alone is involved
(c) neither operator error nor equipment failure is involved
(d) operator error is involved given that equipment failure occurs
(e) operator error is involved given that equipment failure does not occur Are the events E: an operator error occurs, and F: an equipment failure occurs independent? Explain.
Normal adult Mean Temperature is 98.2 and standard deviant is 0.62 with normal distribution. If 16 people are randomly selected determine the probability that their mean body temp is below 98.5 degrees.
Find the expected value when you pick 4 and when you pick 5, betting $1 each time. Based on your results from parts a and b, are you better off picking 4 numbers or picking 5? Explain your reasoning.
9 of 199 males receiving tPa and 13 of 97 males in control group died within 12 months. Create observed and expected contingency tables for these data.
If the reporter were to subject the president's statement to statistical scrutiny by questioning a sample of the company's residential customers, would the test be one-tail or two-tail? What would be the appropriate null and alternative hypotheses..
Make the plot such that if the outlier were removed, the correlation for the remaining points would be greater than r = 0.7.
Test this problem at 99% confidence and provide conclusion. Would the problem have a similar conclusion if we knew the population standard deviation was $40,000? Why?
calculate the z-test for sample 100 sample mean 3.4 population mean 3.67 and standard deviation of
A survey of eating habits showed that approximately 4% of people in Portland, Oregon, are vegans.
Calculate the least-squares regression line for these data and discuss its usefulness.
at a classic car auction you are interested in a 1940 ford standard tudor and decide to bid for the car. there is a
From a statistical point of view, J. Park and Park (2016) reveal a population is all "persons, objects, institutions, or other entities" that can facilitate.
Using numerical and graphical summaries, describe the relationship between each pair of variables
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