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Question: On average, a pair of running shoes can last 18 months if used every day. The length of time running shoes last is exponentially distributed. What is the probability that a pair of running shoes last more than 15 months? On average, how long would six pairs of running shoes last if they are used one after the other? Eighty percent of running shoes last at most how long if used every day?
Construct a stem-and-leaf display for the data, using a leaf unit of 1.
Assume the gasoline mileage of this mileage is approximately normally distributed with a standard deviation of 3.2 miles per gallon. What proportion of 2005 Honda Insights with automatic transmission gets over 60 mpg on the highway?
The manufacturer of a laser printer reports the mean number of pages a cartridge will print before it needs replacing is 12,250. The distribution of pages printed per cartridge closely follows the normal probability distribution and the standard d..
Refer to Exercise 9.10. After the least squares line has been obtained, the table below (which is similar to Table 9.4) can be used for (1) comparing the observed and the predicted values of y, and (2) computing SSE.
After looking it over, you realize that you would rather spend your weekend here. Your reservation at the coast can be canceled easily at no charge. Staying at the new resort, however, would cost $50 more. Would you stay at the new resort or conti..
suppose the number of radios in a household has a binomial distribution with parameters n 12 and p 80 . find the
The ranking procedure described in Exercise 35 is somewhat asymmetric, because the smallest observation receives rank 1, whereas the largest receives rank 2, and so on.
A sample of 100 bugs yields an average weight of 3.6 ounces. Assuming that the population standard deviation is 0.6 ounces, find the margin of error in estimating μ (the true mean weight of all bugs of this type) at the 90 % level of confidence.
an experiment consists of picking one card from a standard deck of cards. are the events picking a red car and
Calculate a 3-month moving average forecast for months 4 through 9 also Compare the two forecasts by utilizing MAD. Which forecast appears to be more accurate.
Which interval is the 99% confidence interval for the difference between the mean wait times of everyone who rode both rides?
In a city 38% of the registered voters are republicans. Determine the sampling distribution of the sample proportion of registered voters who are republicans for samples of 85 voters. Be sure to answer the problem fully and support your answer.
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