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The guidance system for a rocket operates correctly with probability p when called upon. Independently but identical buckup systems are installed in the rocket so that the probability that at least one system will operate correctly when called upon is no less than 0.99. Let n denote the number of guidance systems in the rocket. How large must n be to achieve the specific probability of at least one guidance system operating if: a. p=0.9 and b. p=0.8
suppose that the times people spend being served at a post office window are approximately normal with mean 1.5
What is the probability that: The first randomly selected drinker qualifies? Three sports drink users will have to be interviewed to find the first Gatorade drinker?
Using a one-sided hypothesis test with a 90% confidence level, which of the following statements do these data support?
The average thickness of books on a library shelf is 8.3 centimeters.the standard deviation is 0.6 centimeter. If 20% of the books are oversied, find the minimum thickness of the oversized books on the library shelf.
Suppose a consumer group asked 18 consumers to keep a yearly log of their shopping practicesand that the following data represent the number of coupons used by each consumer over theyearly period.81, 68, 70, 100, 94, 47, 66, 70, 82, 110, 105, 60, 21,..
What is the degree of correlation between the dependent variable and the independent variable? Is the statistical significance of the model as a whole less than the desired statistical significance for the regression model? Explain the basis for yo..
As people use the toothpaste, the amount remaining in any tube is random. Assume the amount left in the ube follows a uniform distribution. How much toothpaste would you expect to be remaining in the tube.
let x1 x2 ... xn be n independent random variables each of which has an exponential density with mean micro. let m be
during a national debate on changes to health care a cable news service performs an opinion poll of 500 small-business
Explain the difference between the null and alternative hypothesis. Which one can be proven in a statistical sense?
The retailer is interested in their preferences. List the possibilities for preference arrangements among the four customers.
the probability of a student getting a a grade in an economics class is .24 and that of getting a b grade is .28. what
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