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A flange bolt wears out because of fatigue in accordance to lognormal distribution with MTTF = 10.00 hr and s =2.00. If preventive maintainance consists of periodically replacing the bolt, what is the reliability at 550hr with and without preventive maintance? Assume the bolts are replaced every 100 operating hours.
1.consider the following scenario for object recognition with two types of objects a and b where the ultimate goal is
Binge drinking and alcohol-related behaviours amongst Pacific youth: a national survey of secondary school students
Descriptive statistics (5-number summary, mean, mode, range and standard deviation) for each of the four variables along with an explanation of what the descriptive statistics tell us about the motion picture industry.
Distribution of scores for Physical Functioning in women is normal, where are 99% of the women's scores around the mean in this distribution? Round your answer to two decimal places.
In a certain region of the country, average radar echo duration of lightning flashes is .61 sec and a standard deviation of .24 sec. Note, that these are population values. Calculate a 95% (two sided) confidence interval for the true average ..
Will all three approaches always result in the same conclusion? Explain.
Obtain a time-series plot and correlogram of the residuals from (9) and comment on them with regard to the violation of classical assumptions. Test for fourth-order autocorrelation using the Breusch-Godfrey procedure
Determine the significance of the difference between the groups and determine whether building systems helped reduce new cases of malaria.
A random sample of 900 homeowners in Delaware County is taken in order to estimate the average amount of money spent by homeowners on landscaping this spring. It turns out that this group spent an average of $200 with a standard deviation of $..
The results of Computerworld's annual job satisfaction survey showed that 28% of IS managers were very satisfied with their job. 46%= somewhat satisfied, 12% neither satisfied or dissatisfied, 10% dissatisfied, and 4% very dissatisfied.
A company makes a chemical product, and based on extensive experience they believe the critical-to-quality variable for this product has mean 410 and standard deviation 10.
What was the total number of participants surveyed for the study and what was the total number of participants who completed the entire survey?
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