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An outbreak of cyclosporiasis was detected among residents of New Jersey. In a case-control study, investigators found that 21 of 30 case-patients and four of 60 controls had eaten raspberries. Calculate the measures of association.
The BATF wants to evaluate true average lead level for California wines to within 29 parts per billion at 95% level of confidence?
The standard screening test for Down's Syndrome is based on combination of maternal age and the level of serum alpha-fetoprotein. Using this test 80% of Down's syndrome cases can be identified, while 5 % of normals are detected as positive.
given are five observations collected in a regression study on two variables.x12691320y1718926231. what percentage of
What is the probability that next years annual maximum negative return exceeds all previous negative returns? In other words, what is the probability that next years maximum negative return is a new record?
regression analysis and cost estimationthe ceo of carson company has asked you to develop a cost equation to predict
1. There are 23 people at a party. Explain what the probability is that any two of them share the same birthday. 2. A cold and flu study is looking at how two different medications work on sore throats and fever. Results are as follows:
Tungsten content of the mined mineral. Further mining of the drift would be justified if the grade is above 1.25% W; can we be 95% confident that this is the case?
Develop a forecast of enrollment next semester using exponential smoothing with a a= 0.2. Assume that an initial forecast for the first semester was 120 (so the forecast and the actual were the same.)
Students conducted an experiment to determine whether the Belgium-minted Euro coin was equally likely to land heads up or tails up. Coins were spun on a smooth surface, and in 330 spins,180 landed with the heads side up.
1. List the four steps of hypothesis testing, and explain the procedure and logic of each. 2. Based on the information given for the following studies, decide whether to reject the null hypothesis. Assume that all populations are normally distribut..
What test of significance did the researchers use? This can usually be found in a discussions section or reviewed in the methods section of a research article.
in a trial of 180 patients who received 10-mg doses of a drug daily 27 reported headache as a side effect. use this
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