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Suppose that in the long run thirty percent of all vehicles passing through a tollbooth are 4WDs. If a random sample of 120 vehicles passing through the tollbooth is taken, what is the probability that the sample proportion containing 4WDs is between .25 and .33?
you are testing whether there is a significant difference in the proportions of college students and similar aged non college students having accidents during the two year period. Is this a one sample or two sample test?
of employees in a particular industry 60 are female. if employees are selected one at a time stopping as soon as a
multiple regression is the method of analysis thata uses sever independent variables to predict the category to which a
Barbara Flynn is in charge of maintaining hospital supplies at General Hospital. During the past year, the mean lead time demand for bandage BX-5 was 60 (and was normally distributed).
In a survey conducted to see how long Americans keep their cars, 2000 automobile owners were asked how long they plan to keep their present cars. The results of the survey follow. Find out the probability distribution associated with these data.
Find the probability of guessing (a) exactly three answers correctly, (b) at least three answers correctly, and (c) less than three answers correctly.
Use the following frequency distribution (of SAMPLE DATA)in answering the questions: class 0-10 f=10; class 10-20 f=20; class 20-30 f=40; class 30-40 f=20; class 40-50 f=10. What is the value of the standard deviation
q1. find the probabilities for the following discrete random variablesa. among a shipment of 5000 tires 1000 are
prepare a 1400- to 1750-word paper addressing the following explain how internal and external factors affect the four
The mean amount of time a (unnamed) computer server is down is 18.3 minutes with a standard deviation of 5.7 minutes.
Describe the trend in calorie intake over the 30 years. What would you predict the calorie intake was in 2005? Justify your answer by explaining any assumptions you are making about calorie intake.
a population standard deviation is estimated to be 13. we want to estimate the population mean within 1.7 with a
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