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The requirements for a machine call for a reliability of 0.9 at 10,000 operating hours. It is known that the time-to-failure follows a Weibull distribution with β= 2.
a) What should be the median time to failure of the Weibull distribution to meet the reliability requirement?
b) Suppose this reliability cannot be met, and the actual median is 20,000. So the company instead implements a preventive maintenance policy with a maintenance cycle of 4,000 hours. What is the new reliability at 10,000 hours?
Following is a payoff matrix for Intel and AMD. In each cell, 1st number refers to AMD's profit, while second is Intel's.
The quarterly returns for a group of 69 mutual funds with a mean of 2.3% and a standard deviation of 5.9% can be modeled by a normal model. Based on the model N(0.023, 0.059), what are the cut off values for the:
What is the probability that an executive who speaks a foreign language has not traveled internationally?
Is the income elasticity of demand for real cash balances significantly different from one?
There are 10 flights from Minneapolis to St. Cloud each day. The probability that any one flight is late is 0.05. Using the binomial probability formula, what is the probability that 1 or more are late?
If a citizen who voted in the last election is randomly selected, what is the probability that they are a Democrat?
One airport had 28% late arrivals. After a new directing system was installed, a sample of 1200 flights had 322 late arrivals. At the .01 level, did the new system lower the rate of late arrivals? List the null and alternate hypotheses.
Question: If you were to roll a single die 10 times, the result of each roll would be __________ A) Mutually exclusive of the other nine rolls B) Proportional to the other nine rolls
A famous hypnotist performs to a crowd of 350 students and 180 non-students. The hypnotist knows from previous experience that one half of the students and two third on the non-students are hypnotizable. What is the probability that a randomly cho..
Your firm has determined that if the average household salary in a geographic area is greater than $53000, then their product will be successful.
The market for olive oil in new York City is controlled by 2-families, Sopranos and Contraltos. Both families will ruthlessly eliminate any other family that attempts to enter New York City olive oil market.
Test the hypothesis that random variable 30.4 31.2 30.8 29.9 30.4 30.7 29.9 30.1 come from a normal distribution with mean 30.5. The standard deviation of the measurements is known to be 0.1
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