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Suppose that n items are being tested simultaneously; that the items are independent; and that the length of Life of each item has an exponential distribution with parameter p. Determine the expected length of time until three items have failed.
What is the problem or opportunity that this study is seeking to address? Why is this study important and to whom and what was the methodology used to select your sample of participants for the study.
Here are the numbers of wins for the 30 National Basketball Association teams for the 2004-2005 NBA season.
An olympic archer is able to hit the bull's-eye 70% of the time. Assume each shot is independent of the others. If she shoots 6 arrows, what is the probablitly that she never misses?
Compute a 90% confidence interval for the population mean, based on the sample 25, 27, 23, 24, 25, 24, and 59. Change the number from 59 to 24 and recalculate the confidence interval.
The following data show the advertising expenses (expressed as a percentage of total expenses) and the net operating profits (expressed as a percentage of total sales) in a random sample of six drugstores:
Wondering if there is evidence that drivers of SUVs are safer, we hope to create a 95% confidence interval for the difference in driver death rates for the two types of vehicles. Are these data appropriate for this inference? Explain.
suppose you decide to take a sample of size 2 n2 by rolling a die twice. produce a histogram representing the sampling
The grades on a chemistry midterm at Talladega College are normally distributed with M=78 and σ = 6.2. John scored 72 on the exam.- Find the z-score for John's exam grade.- What does this answer mean?
in many cities the network national news is broadcast at 630 or 700 p.m. in most cities the national news is preceded
Find the height/level of the tree and how many leaves does the tree have
Find the empirical probability that an iris bulb of this type will bloom. Give answer as a fraction in lowest terms. How many of the bulbs should she plant next fall if she would like at least 52 to bloom?
Select a question from your questionnaire where the responses were not at either extreme of the rating scale and change the wording to draw a mostly negative or mostly positive response.
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