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A researcher wishes to estimate with 95% confidence, the proportion of adults who have high speed internet. Her estimate must be accurate within 2% of the true proportion. a) Find the minimum sample size needed using the previous study that showed 58% had high speed internet. b) No preliminary estimate is available. n=
Why do so many of life's events share the same characteristics as the central limit theorem? Why are estimations and confidence intervals important?
One side of a rectangular stage is 2 meters longer than the other. If the diagonal is 10 meters, than what are the lengths of the sides?
A sample of 100 one-dollar bills from the Subway cash register revealed that 16 had something written on them besides the normal printing (e.g., “Bob ? Mary”). (a) At α = .05, is this sample evidence consistent with the hypothesis that 10 percent or ..
Compare the unconditional probability of having the disease to the conditional probability of having the disease given the test says you have the disease.
What is the probability of finding a sheet chosen at random which contains 3 or more surface flaws and find the greatest standard deviation,
A teacher wants to know if students in her biology class did significantly better on an exam after instruction using authentic learning. The scores pre and post test are listed below. Based on an α = .05, what can the teacher conclude?
It is not unusual for a battery to have life span that is more than 2470 hours as the z-score is within 2 standard deviations of mean.
In order to test the assumption of a Poisson distribution, a random sample of 150 ten-minute intervals was taken.
A five-star hotel accepts 100 room reservations daily. For each reservation accepted, there is a 7% chance that the guest will not arrive.
1.a local farmer is interested in comparing the yields of two varieties of tomatoes. in an experimental field he
That the requirement is NULL AND VOID. To be PROVED UNWORKABLE and sink like the Titanic? It is WORTH a little delay to have such a desirable result, isn"t it?
Without using formulas, explain the meaning of (a) expected value of a random variable; (b) actuarial fairness; and (c) variance of a random variable.
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