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When the health department tested private wells in a county for two impurities commonly found in drinking water, it found that 20% of the wells had neither impurity, 40% had impurity A, and 50% had impurity B. (Obviously, some had both impurities.) If a well is randomly chosen from those in the county, find the probability distribution for Y ,the number of impurities found in the well.
a certain disease is found in one person in 5000. if a person does have the disease the test will show a positive
Find the critical value and the test statistics. State them here. Is this a right, left, or two-tailed test? Sketch a normal curve, mark the critical value and test statistics, and shade the rejection region on the curve.
the anxiety general stress test angst has been designed to gauge the level of psychological stress management
1. when an engineer wants to send a binary signal a 0 or 1 signal through a communication channel assume that there is
Which of the following is not a characteristic of successful Six Sigma programs? Which of the following is the most important factor associated with Design of Experiments (DOE)?
He came to work at 8:00 and began to make calls. By 11:00 a.m., his survey was done. Don't discuss what is not said. Discuss what is wrong with what is said.
Create a frequency table and histogram for each of the numerical variables in this data set. Indicate whether each of these distributions is approximately symmetric or skewed. Which, if any, of these distributions are skewed to the right? Which, i..
The stakeholders in the simulation have different opinions as to the proper course of action the organization should take. Explain the decisions you made in the third cycle of the simulation.
Determine a 95% confidence interval for the mean efficiency of a given batch of motors. If we want to cut the confidence interval by 1/3, how many motors should be tested?
4 prizes of $350, & 1 prize of $1000. Assume that 15,000 lottery tickets are issued and sold for $1.00. What is the lottery's expected profit per ticket?
suppose you pay 2.00 for a raffle ticket for local organization raising money. the single winner recieves a 75home
scores on the critical reading part of the sat exam in a recent year were roughly normal with mean 501 and standard
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