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The Bureau of the Census reports that the average commuting time for citizens of both Baltimore, Maryland, and Miami, Florida is approximately 29 minutes (uMiami=29 and uBaltimore=29 minutes). To see if their commuting times appear to be any different in the winter, random samples of 40 drivers were surveyed in each city and the average commuting time for the month of January was calculated for both cities. The results are provided below. At the 0.05 level of significance, can it be concluded times are different in the winter? Miami Baltimore Sample size 40 40 Sample mean 28.5 mins 35.2 mins Population Standard deviation 7.2 mins 9.1 mins.
Persons entering a blood bank are such that 1 in 3 have type O+ blood and 1 in 15 have type O- blood. Consider three randomly selected donors for the blood bank. Let X denot
A final exam in Math 157 is normally distributed and has a mean of 75 with a standard deviation of 12. If 36 students are randomly selected, find the probability that the me
The company decides to reject barometers that read more than 1.5 standard deviations above or below the mean. What is the critical reading below which the barometers will be
Assuming that an IP packet has a maximum 900 byte payload, determine the following. What is the probability that a file transfer requires more than 10 packets? repeat for 10
Translate the following statements into symbolic form using capital letters to represent affirmative English statements.- Reese Witherspoon wins best actress only if Martin Sc
The book has a program on page 153 for this, but the program was written is an unusual way. The subject should be mouse. So how should we dene mouse in the data?
A study looked into the management of various tropical grasses for improved production, measured as dry matter yield in hundreds of pounds per acre over a 54-week study peri
You collect a sample of 100 observations on monthly spending on fast food. The sample mean is $96 and the sample variance is 400. Test the null hypothesis that the populatio
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