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1. Suppose the average thread-life of a certain brand of tire is 42,000 miles and that this mileage follows the expotential distribution method.What is the probability that a randomly selected tire will have a thread--life of more than 40,000 miles?
2. Johns commute time to work during the week follows the normal probability distribution with a mean time of 26.7 minutesand a standard deviation of 5.1 minutes. What is the probability that the commute time for a randomly selected day will be between 28 and 34 minutes?
3.SUppose the roundtrip airfare between philly and los angeles a month before the departure date follows the normal probability distribution with a mean of $387.20 and a standard deviation of $68.50. Wgat is the probability that a randomly selected airfare between two cities will be between $325 and $425?
The expected peak expiratory flow rate in adults is 300 with a standard deviation of 50. how many subjects should be enrolled to ensure 80% power to detect a difference of 15 liters per minute with a two-sided test and significance level of 0.05?
At the .05 level of significance, can we conclude that those joining Weight Reducers on average will lose less than 10 pounds? Determine the p -value.
Describe what type of control chart you can use and how do you calculate the control limits (provide formula) to check if the calculate the control limits in this organization is in control.
Probability based on addition rule - Find the probability that a randomly chosen sold automobile from this sample is silver or an SUV?
explain why it is necessary to have more than one standard procedure for defining and measuring central tenedncy and
7% of his eggs are underweight, and that 14% weigh over 72 grams. If a normal model is appropriate, what would the standard deviation of his egg weights be?
The city of Oakdale wishes to see if there is a linear relationship between the temperature and the amount of electricity used (in kilowatts).
Assume the earnings from this investment project is a normal distribution. What is the probability that you will lose money or earn nothing from this project.
What are common practices in writing literature reviews to avoid because they are forms of plagiarism? What should be done instead? How would you organize your literature before writing a lit review?
List all samples of 3 and compute the mean of each sample. Compute the mean of the distribution of sample means and population mean. compare the two values
The manager of Petroco service station wants to forecast the demand for unleaded gasoline next month so that the proper number of gallons can be ordered from the distributor.
65% were not interested in returning to work. Find the 95% confidence interval of the true proportion of workers who do not wish to return to work.
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