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Consider two components whose lifetimes X and Y are independent and exponentially distributed with parameters lambda_x and lambda_y, respectively. Find the joint pdf of total lifetime X+Y and the proportion of total lifetime X/(X+Y) during which the first component operates
If researcher obtains sample mean of M = 88, which combination of factors is most likely to result in rejecting null hypothesis?
according to the journal chemical engineering an important property of a fiber is its water absorbency. a random
Which of the following is not an advantage of using a cluster sample instead of other types of samples?
A sample of 200 college students resulted in the numbers below. At "alpha" = 0.05, can we conclude that opinions of college students differ from those in the national survey of adults?
Standard deviation of 100. The top 3% of students receieve $500. What is the minimum score you would need to receive this money? Calculate the z-score.
A) Describe the term population. B) Describe the term random sample. C) What is the difference between a population and a random sample?
Does thus data support the researchers' hypothesis? Test the relevant hypothesis using a = .1 by first calculating a p-value.
q1. a manufacturing company measures the weight of boxes before shipping them to the customers. if the box weights have
A least squares linear trend line is just a simple regression line with the independent variable being time (months or years for example).
A mean of 25 inches and a standard deviation of 5 inches. What is the probability that the area receives at least 30 inches of rain in a year?
What is the probability that the birth weight of a randomly selected baby of this type:
Iif the person scores in the upper 6 percent of the distribution. What is the lowest score a college graduate must earn to qualify for a responsible position?
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