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The most common water pollutants are organic. Since most organic materials are broken down by bacteria that require oxygen, an excess of organic matter may result in a depletion of available oxygen. In turn, this can be harmful to other organisms living in the water. The demand for oxygen by the bacteria is called the biological oxygen demand (BOD). A study of streams located near an industrial complex revealed that 35% have a high BOD, 10% show high acidity, and 4% have both characteristics. Are the events the stream has a high BOD and the stream has high acidity independent?
while writing an article on the high cost of college education a reporter took a random sample of the cost of new
The number of retail drug prescriptions (in millions) can be approximated by y=80.53x+2912.78 where x=0 corresponds to the year 2000. Find the approximate number of prescriptions in the following years.
Concern 2-card hands from a standard 52-card deck. A standard deck has 13 cards from each of 4 suits (clubs, diamonds, hearts, spades).
Suppose the world series is about to begin. Some people get together and each decide to predict different win-loss patterns for the seven possible games during the coming series.
How can reducing packaging inefficiencies improve the performance of a logistics system?
in a recent survey ten percent of the homes in montana were found to own a miley cyrus action figure. in a sample of
The technician has just made an attempt to calibrate the machine. a. What is the probability that the machine is in adjustment?
Wondering if there is evidence that drivers of SUVs are safer, we hope to create a 95% confidence interval for the difference in driver death rates.
A sample of n=10 in each treatment. For this study, the three samples have SS1=10, SS2=20, and SS3=15. What value would be obtained for MSwithin?
Out of a total of 10 college textbooks estimate the standard devialtion of their ages if the oldest textbook is known to be 7.9 years old and the newest textbook is 1.3 years old.
A study was conducted to determine if there was a relationship between the prices a non-member of a club paid for various publications and the prices that a member paid for the same publications. The data gathered is shown below.
Refer to the Real estate sales data set in Appendix C.7 and Case Study 9.3 I. Select a random sample of 300 observations to use as the model-building data set
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