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Colormetric method is used to test lake water for nitrates. If water specimens contain nitrates, a solution dropped into the water will cause the specimen to turn red 95% of the time. When used on water specimens without nitrates, the solution causes water to turn red 10% of the time. A past lab study 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 and turns red when tested, calculate the probability that it actually contains nitrates. Use a tree diagram.
a) Draw the scatter diagram. Does it appear that x and y are related? If so, how? b) Test to determine whether there is evidence of a linear relationship.
question 1. select any two qualitative data of your survey. from your qualitative data carry out at least two
At 95% confidence, test to determine if more than 21% of the population will like the new soft drink.
an oil drilling company ventures into various locations and its success or failure is independent from one location to
question the proportion of successes in a random sample of 400 was calculated as 50.a. estimate the population
suppose the amount of cosmic radiation to which a person is exposed folows normal distributioin with a mean 5.853 and
Based on this information, determinethe probability that specific fare will exceed $15.00?
With each hypothesis, indicate whether the appropriate analysis would be a one-tailed test or a two-tailed test and indicate a type I and type II error, given the context of the hypothesis.
a persons blood glucose levels and diabetes are closely related. let x be a random varibale measured in milligrams of
five years ago the standard deviation of the ages of the undergraduate business students was 1.5 years. recently a
R1 signifies the first Poisson event time after m (or 1 if there are no Poisson events in [m,1]), then it would be learned that marked position lies between L1 and R1.
the mean score of the first calculus exam was 81. the standard deviation was 12. find the smallest interval about the
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