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The usable lifetime of a particular electronic component is known to follow an exponential distribution with a mean of 6.2 years. Let X = the usable lifetime of a randomly selected component.
(a) The proportion of these components that have a usable lifetime between 5.9 and 8.1 years is .
(b) The probability that a randomly selected component will have a usable life more than 7.5 years is .
(c) The variance of X is.
There are two telephone lines A and B. Let E1 be the event that line A is being used and E2 be the event that line B is being used
There are two other mathematically equivalent ways to do a hypothesis test: the p value method and the critical region method. Can you describe them? What is the null hypothesis?
Is this strong enough evidence to prove the hypothesis that the mean of the Poisson distribution was greater than 6.7?
The data below represents the population of a certain country every 10 years for the years? 1900-2000. How do I determine the? least-squares regression?
What is the fair price of one AFA bond to the nearest cent?
Supposes that the diameter of bearings are independent normally distributed random variables with mean µB = 1.005cm and variance σ²B = (0.003)² cm² . The diameter of shafts are independent normally distributed random variables having mean µB = 0.9..
A manufacturer of microwaves gathers information on microwave sales from a random sample of 50 stores in a large retail chain. In the sample, the mean number of microwaves sold per store last week was 19, with standard deviation 2.
a. Use Equation (4.13) to write a formula for the median ,m of the lognormal distribution. What is the median for the load distribution of Exercise 79?
There are confusions with mean, mode and median. Compare these numbers from a normal distribution with that of an exponential decay.
researchers claim that herbal supplements such as ginseng or ginkgo biloba enhance human memory.to test this claim a
Does there appear to be a linear relationship between the screen size and the price?b. Which variable is the "dependent" variable?
Discuss some of the major differences between GASB and FASB when it comes to setting accounting standards. Why are there major differences between governmental accounting systems vs. business accounting systems?
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