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A missile has a mass of 1.5 Mg (without fuel). If it consumes 500 kg of solid fuel at a rate of and ejects it with a velocity of relative 2000 m/s to the missile, determine the velocity and acceleration of the missile at the instant all the fuel has been consumed. Neglect air resistance and the variation of its weight with altitude. The missile is launched vertically starting from rest.
X has a normal distribution with a mean of 80.0 and a standard deviation of 3.5. Find the following probabilities.
a bank with branches in a large metropolitan area is considering opening its offices on saturday but it is uncertain
What score was earned by more students than any other score? Why? What was the highest score earned on the exam?
1.ten years ago a study at a large midwestern university found that 18 of the students at the university were very
Determine the characteristic values of the given matrix and find the corresponding vectors:
Calculate a 95 percent confidence interval for the mean percentage share of billing volume from network television for the population of all US advertising agencies.
statistical correlation and regression always inspire a certain degree of fascination because they provide a
Let X 1 , X 2 , X 3 , X 4 be a random sample from a Poisson distribution with parameter λ and let Y = X 1 + X 2 + X 3 + X 4 . You decide to test λ = 1.60 versus λ
A box has red marbles and blue marbles. The fraction p of reds is unknown. 250 marbles are drawn at random with replacement, and 102 turn out to be red. Estimate p. Attach a standard error to your estimate.
Variations of the Monty Hall problem - find out in advance which door has the car behind it. In the spirit of "the show must go on," he makes a guess at which of the two doors to open and gets lucky, opening a door behind which stands a goat. Now ..
A researcher is interested in the effect of an electrolytic sports drink on the endurance of adolescent boys. A group of 30 boys is selected and half are given a treadmill endurance test while consuming the sports drink and the other half take the..
What is a nonparametric test and what is a parametric test - If the Kruskal-Wallis test is to be used with the data in the above exercise, the samples should be simple random samples. What is a simple random sample?
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