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The output from a sewage treatment plant is constantly monitored to assess treatment efficacy. Suppose that the mean coliform content is 20 bacteria / ml with a standard deviation of 4 bacteria / ml. Assume the distribution of coliform content is approximately normal. An automatic measuring device is being used to monitor the bacterial levels. An alarm should ring whenever the bacterial level exceeds the 97.5th percentile. When should the alarm ring?
a. 20 bacteria per mlb. 32 bacteria per mlc. 24 bacteria per mld. 28 bacteria per mle. 16 bacteria per ml
Where should the warranty limits be set so that only 10% of the TVs need repairs at the manufacturer's expense?
Solve problem graphically1. Describe optimal solution and objective function value in context of the problem.
University officials at a major university would like to use three -term moving averages to examine enrollment. Enrollment data (in thousands of students) for the 12 most recent terms are shown in middle column of the table below.
The speeds of all vehicles have a bell-shaped distribution with a mean of 72 mph and a standard deviation of 3 mph. Using the empirical rule, find the percentage of vehicles with the following speeds on this section of I-95.
Create a model which predicts the variation in educational attainment among the counties of Georgia. This will require some initial exploration of the data: useful techniques will include numerical summaries as well as visual tools (which may even..
Does this mean immigrants tend to earn more than other people? Or does it mean immigrants improve a state's economy? If not, what could explain the correlation?
List the stages involved in analysing qualitative data. When would you prefer the grounded theory approach to qualitative data analysis?
She does not know the true value of the population standard deviation, but is reasonably sure that the underlying population is approximately normally distributed. Should she use a z-test or a t-test in carrying out the analysis? Why?
What are the reasons for conducting a two-way analysis rather than two separate one-way ANOVAs? Explain.- What are the limitations of two-way ANOVA? What problems may be encountered?
The entire shipment is accepted if only one or non of the tablets is defective. If the defect rate is 5% then what is the probability that the shipment will be accepted?
If student is chosen at random, determine the probability that he or she is sophomore and owns a credit card.
a researcher wants to construct a 98 confidence interval for the proportion of elementary school students in seward
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