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A certain brand of shoes comes in 5 different styles, with each style available in 4 distinct colors. If the store wishes to display pairs of these shoes showing all of its various styles and colors, how many different pairs will the store have on display?
The sameple you found that 114 of those adults sampled over the age of 24 smoke. Develop a 95% condience interval for the current porportion of adults over the age of 24 who smoke.
Let {Xn } be a submartingale. Show that EXn is a nondecreasing sequence of numbers, and give an example to show that Xn - EXn is not necessarily a martingale. Hint: Consider the uniqueness in the Doob decomposition.
What are the null and alternative hypotheses to test if the new battery has longer life than the old battery? Draw a conclusion for the hypothesis test. Make sure you state your conclusion in the context of the problem.
Derive a conservative one-sided upper 95% confidence interval for θ if x=4 is observed.
Many people think that job satisfaction in workplace is directly related to annual income. To check the validity of this assumption survey of 430 active working adults in U.S was taken that relates their job satisfaction to their annual income.
trials are performed in sequence. if the last two trials were successes then the next trial is a success with
the weights of a population of workers have mean 167 and standard deviation 27. if a sample of 36 workers is chosen
The probability distribution of the daily demand for a product is shown below. What is the expected number of units demanded per day? Determine the variance and the standard deviation.
A device has a sensor connected to an alarming system. The sensor triggers with probability 0.95 if dangerous conditions exist in a given day and with probability 0.005 if conditions are normal during the day. Days with dangerous conditions occur ..
a sample survey is designed to estimate the proportion of sports utility vehicles being driven in the state of
question a random sample of 250 juniors majoring in psychology or communications at a large university is selected.
A grab bag comprises 11 $1 prizes, 7 $5 prizes, and 2 $20 prizes. Three prizes are selected at random. Determine the probability which exactly two $20 prizes are chosen?
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