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Question: Water quality. An environmentalist group collects a liter of water from each of 45 random locations along a stream and measures the amount of dissolved oxygen in each specimen. The mean is 4.62 milligrams (mg) and the standard deviation is 0.92 mg. Is this strong evidence that the stream has a mean oxygen content of less than 5 mg per liter?
Suppose that the incidence of MI is 0.005 per year among subjects who are actually take placebo and that aspirin prevents 20% of MIs
how do you create a histogram in excel when you have the following data on 40 best paid executivesrank 1-40 ceo name
the sheet univampcol contains data on 80 colleges and universities. among the variables included are the annual total
You are examining a brick manufacturing facility. The process has historically produced 5% nonconforming bricks. Calculate the expected value and standard deviation of the number of nonconforming bricks during a typical hour of production
Excel users should note that any row containing one or two empty cells must be removed. Use a 5% significance level. For each of the following variables, conduct a test to deter- mine whether there are differences between the three political party..
Use these data to create a data-based CDF for the distribution of weights for lab animals. Estimate the probability that an animal's weight will be less than 9.5 grams.
Based on its position in the periodic table of the elements, which pure element would also react violently with oxygen and water?
determine the point estimate of the population proportion the margin of error for the following confidence interval and
1. define in your words nominal ordinal and interval-ratio levels of measurement. provide 3 examples for each level of
What is the p-value and compute a 95% CI for the difference in means between the two groups?
A hockey club has 7 forwards, 5 defensemen, and 3 goalies. Each can play only in his designated subgroup. A coach chooses a team of 3 forwards, 2 defense, and 1 goalie.
According to a survey cited in Newsweek, 29.7% of married survey respondents who were married between the ages of 20 and 22 (inclusive), 26.9% of those.
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