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Assume the speed of vehicles along a stretch of I-10 has an approximately normal distribution with a mean of 71 mph and a standard deviation of 8 mph.
a. The current speed limit is 65 mph. What is the proportion of vehicles less than or equal to the speed limit?
b. What proportion of the vehicles would be going less than 50 mph? 267
c. A new speed limit will be initiated such that approximately 10% of vehicles will be over the speed limit. What is the new speed limit based on this criterion?
d. In what way do you think the actual distribution of speeds differs from a normal distribution?
Flavor deterioration. The results shown below were obtained in a small-scale experiment to study the relation between 0 F of storage temperature (X) and number of weeks before flavor deterioration of a food product begins to occur (Y).
Construct a 95% confidence interval estimate for the population mean turnover time. Interpret the interval constructed in (a). Do you think the quality improvement project was a success?
let x be the amount of premium gasoline in 1000 gallons that a service station has in its tanks at the beginning of a
According to the U.S. Army Corps of Engineers, the top 20 U.S. ports, ranked by total tonnage (in million tons), were as follows.
To exercise your skills, you are to perform the following using different tools available to you (e.g. Excel spreadsheet, graphing calculator, etc.) and write and explanation on your findings:
If we select 84 students (ASSUME INDEPENDENCE), what is the Standard Deviation of the Probability Distribution that would list the number of students.
A truck driver is waiting to join the traffic on the service road of a highway. The truck driver blocks the service road for four seconds when he joins the traffic.
Describe how the confidence intervals will change depending on whether the population standard deviation is known or unknown.
consider your study terrorism ideology and perception of national security strategies by local police conduct a mock
the average time it takes college freshmen to complete the mason basic reasoning test is 38.3 minutes. the standard
in a study of 10 insurance sales representatives from a certain large city the average age of the group was 48.6
According to Strategic Finance, Medtronic, Inc., recently applied two quality improvement methods to its global finance operations.
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