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Water specimens contain nitrates, a solution that is dropped into the water will cause the specimen to turn red 95% of the time. When used on water specimens without nitrates, the solution turns the water red 10% of the time. Past experience in the lab indicates that nitrates are contained in 30% of the water specimens that are sent to the lab for testing. If a water specimen is randomly selected
1. from among those sent to the lab, what is the probability htat it will turn red when tested?
2. and turns red when tested, what is the probability that it actually contains nitrates?
According to a report of the Nielsen company 65% of internet searches in may 2010 used the google search engine. Assume that sample of 20 searches is studied. b) what is the probability that more than 16 of them used google? c) what is the probabilit..
a. What are the mean and the standard deviation of the sample mean? What is the probability distribution for the sample mean? Describe this sampling distribution and draw the graph of this probability distribution with its mean and standard deviation..
thompson photo works purchased several new highly sophisticated processing machines. the production department needed
Give the state transition probability matrix
A certain disease is found in one person in 5000. If a person does have the disease, the test will show a positive result 93% of the time. If a person does not have the disease, the test in 1 out of 500 cases will give a false positive result..
A survey showed that the probability that an employee gets placed in a job
Characteristics on patients participating in a clinical trial.
Find TWO peer-reviewed articles that provide examples of studies that utilize the meta-analysis procedure and that were not already discussed by a classmate(s) for this week''s forum discussion. In your own words (i.e., no direct quotes!), briefly de..
Q-mart is interested in comparing its male and female customers. Q-mart would like to know if the amount of money spent by its female charge customers differs, on average, from the amount spent by its male charge customers. To answer this question, a..
Write a brief note stating the circumstances under which cusum charting may be preferable to normal Shewart charting methods and calculate the mean of the sample values below, and suggest a suitable value for k, the cusum reference value.
15. Assume that x has a normal distribution with the specified mean and standard deviations. Find the indicated probabilities. P(2.9
The LDL cholesterol levels in a certain population has the distribution N(5.9, 0.8). 1. What is the cholesterol level of the 'healthiest' (i.e. lowest!) 20%?
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