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Let X and Y be independent random variables, each exponentially distributed with parameter A. Find the probability density function of Z = X1(X + Y).
The first and third quartiles were 17.95 and 35.45 miles per gallon, respectively, Develop a box plot and comment on the distribution. Is it a Symmetric distribution?
you are a manager of a 7-eleven. you have determined the probability a customer buys gasoline 0.32. you have also
twelve different video games showing substance use were observed and the duration times of game play in seconds are
The researcher computed the number of migraines individuals reported during a six-month time frame as a function of the amount of stress they reported during that same time period. There were three stress levels: low, mild, and severe.
Survey questions. Examine each of the following questions for possible bias. If you think the question is biased, indicate how and propose a better question.
Ace Machine Works estimates that the probability its lathe tool is properly adjusted is 0.8. When the lathe is properly adjusted, there is a 0.9 probability that the parts produced pass inspection.
Suppose you randomly draw two cards from a standard deck without replacement. What is the probability that neither card is the ace of spades?
Access the student survey data completed by 446 students in introductory statistics courses at a large university in the fall of 2003.
Assume the underlying population distribution is normal and that σ = 15.5. Is there any evidence to suggest the mean locksmith service charge in this city is greater than $68? Use a = 0.05.
1.consider a small experiment to investigate if biofeedback can reduce blood pressure. six subjects were randomized to
Compare the two servers with respect to the variation (spread) among tip percentages. Explain whether you think there are any outliers in the dataset or not.
The two cars drove a combined total of 1450 miles, and the sum of their fuel efficiencies was 40 miles per gallon. What were the fuel efficiencies of each of the cars that week?
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