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A plant purifies its liquid waste and discharges the water into a local river. The EPA collects water specimens of the discharge of the plant and also water specimens in the river upstream from the plant. The average bacteria counts for each of six specimens taken from the two locations are given below:
Plant discharge 30.1 36.2 33.4 28.2 29.8 34.9
Upstream 29.7 30.3 26.4 27.3 31.7 32.3
Test whether the mean bacteria count for the plant discharge exceeds that for the upstream location, and state your conclusions.
three samples of 9 members each were selected representing urban suburban and rural residents to evaluate their
question the u.s. government accountability office recently indicated the price of college textbooks has been rising
the weights of bags of candy are normally distributed with a mean of 28 ounces and a standard deviation of .28 ounce.
Also how inventory can act as a buffer in the production process. Discuss why it is sometimes prudent not to order the minimum level required to obtain a quantity discount.
Construct a 90 percent confidence interval for the true mean weight. (b) What sample size would be necessary to estimate the true weight with an error of � 0.03 grams with 90 percent confidence?
A sample of 25 students enrolled in the university indicates that X (bar) = $315.4 and s = $43.20.
Before you run your scatter diagram answer the following: What do you think you will find? Bigger fields have more seats? Smaller fields have more seats? No relationship exists between field size and number of seats? A strong relationship exists betw..
find a 95 confidence interval for the slope in each of the following settings note it is y careta. n 25 y 5.3 1.10x
According to an internet posting, 80% of adults enjoy drinking beer. Choose a group of 3 adults at random. The probability that none of them enjoy drinking beer is:
Your office has just received 140 insurance claims to be processed in the next few days. Find the following probabilities.
eleven patients were weighed before and after a diet which was designed to help patients reduce weight. eight of these
a child types the letters q w e r t y randomly producing 1000 letters in all. what is the expected number of times that
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