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The time (in years) until the first critical-part failure for a certain car is exponentially distributed with a mean of 3.4 years. Find the probability that the time until the first critical-part failure is less than 1 year.
What are the implications of BitTorrent for the music industry? For the motion picture industry?
The length of human pergnancies is aprox normally distibuted with a mean of 266 days and a standard devation of 16 days what is the probability the pregancy will last between 160 and 255 days?
Determine whether the given value is a statistic or parameter. in a study of all 1900 students at a college, it is found that 25% own a computer.
Multiple choice. You take a quiz with 6 multiple choice questions. After you studied, you estimated that you would have about an 80% chance of getting.
Who's the boss? The 2000 Census revealed that 26% of all firms in the United States are owned by women.
although the phenomenon is not well understood it appears that people born during the winter months are slightly more
A recent article in Business Week listed the "Best Small Companies." We are interested in the current results of the companies' sales and earnings.
Let X1, ..., Xn be i.i.d. from the exponential distribution E(a, ?) with unknown a and ?. Find a UMA confidence interval for a with confidence coefficient 1 - a
A computer system uses passwords constructed from the 26 letters (a to z) or 10 integers (0 to 9). Suppose there are 10000 users on the system with unique passwords. A hacker randomly selects (with replacement) passwords from the potential set.
Is the large-sample confidence interval for the difference in two proportions appropriate to use in this setting? Explain your answer.
in an experiment to learn if substance m can help restore memory the brains of 20 rats were treated to damage their
At the 0.005 level, evaluate the effectiveness of the new ball in increasing distance. Using the appropriate statistical table, what is the approximate p-value for this test?
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