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An industrial crane is operated by four electric motors working together. For the crane to perform properly, the four motors have to generate a total of at least 380 horsepower. Engineers from the plant that produces the electric motors have stated that motors off their assembly line average 100 horsepower, with a standard deviation of 10 horsepower. The four electric motors on the crane have just been replaced with four brand new motors from the motor manufacturer.
A safety engineer is concerned that the four motors might not be powerful enough to properly operate the crane. Stating any additional assumptions you are using, does the engineer's concern appear to be justified?
question a process for the manufacture of penicillin was studied. there were five variants of the basic process being
catco has a new line of kitten starter kits. the basic kit features a sandbox sand scooper three cans of kitten food
Assume that a 95% confidence interval estimate of the population mean annual starting salary is required. What is the planning value for the population standard deviation?
Women's heights average 61 inches with a standard deviation of 2.8 inches in a certain study. Use the 68-95-99.7 rule to determine the typical ranges of the women's heights. In what range will approximately the middle 95% of the women's heights li..
List an advantage and a disadvantage of a survey conducted in this manner. What sampling technique is used in such a survey?
a tennis player makes a serve 72 percent of the time. suppose the player gets 80 serves in a match.what is the mean and
a researcher wanted to determine if the average waiting time at the emergency room in a local hospital is greater than
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x1 = 100 and x2 = 127 successes were observed. What is the best point estimator for the difference ( p1-p2) in the two binomial proportions?
Assuming an exponential service rate μ, set this up as a birth and death process and determine the birth and death rates.
which statement is true about the scope of systematic reviews srs?a. srs should be as broad as possibleb. srs should be
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