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1. For the last 300 years, extensive records have been kept on volcanic activity in Japan. From historical records the mean number of eruptions or instances of major seismic activity is 2.4 per year. A researcher is interested in modeling the number of eruptions or major seismic activities over the 5-year period of 2005-2010. (Hint remember how the Poisson distribution scales)
a. Assuming approximate normality, what is probability of 5 eruptions or instances or fewer over the 5-year period?
b. Assuming approximate normality and using continuity correction, what is the probability of more than 20 eruptions during the 5-year period?
in an illustration of normal probabilty distribution a shaded are represents
Prior experience has shown that the weight has a probability distribution with µ= 6 ounces and s = 2.5 ounces. What is the standard error of the mean?
Reconsider Prob. 19.3-3. Because of the popularity of the Power model computer, Tim Madsen has found that customers are willing to purchase a computer even when none are currently in stock as long as they can be assured that their order will be fi..
Test the financial analyst's belief that the average rate charged by credit cards with monthly fees is less than 14%. Use a 5% significance level.
a study of the influence of corrosion inhibitor on the failure of aluminum-wired twist-on connections the data obtained
Would a normal model be appropriate to describe the distribution of sale prices?
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On the production line the company finds that 99.7% of products are made correctly. You are responsible for quality control and take batches
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Use MINITAB or some other computer software to construct a histogram of the drying-time data in Exercise 115. The following are the drying times (minutes) of 100 sheets coated with polyurethane under various ambient conditions:
Fit an appropriate polynomial trend model along with seasonal dummies to make a forecast for November and December of 2010.
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