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A country is considering raising the speed limit on a road because they claim that the mean speed of vehicles is greater than 30 miles per hour. A random sample of 15 vehicles has a mean speed of 35 miles per hour and a standard deviation of 4.7 miles per hour. At ? = .01, do you have enough evidence to supprot the country's claim?
Calculate the p-value:
It should be .0001, but I'm not sure how to get this.
Compare and contrast the characteristics of parametric and non-parametric test methodologies. Give examples of when to use each.
The histograms of some sampling distributions are symmetrical. T-F What would make a histogram symmetrical, and give an example of a symmetrical distribution? A random sample of size 36 is to be selected from a population that has a mean μ = 50 an..
Among Americans who are auto racing fans, 59% identify NASCAR as their favorite type of racing. What is the probability that all four have NASCAR as their favorite?
fifty percent of the people that get mail-order catalogs order something. find the probability that only four of the 10
in a manufacturing process a random sample of 49 bolts manufactured has a mean length of 1.24 inches with a standard
Imagine that these results are disseminated to the general public through publication and media coverage. Write about one possible harmful consequence that these conclusions could have in the "everyday" world.
a garden seed wholesaler wishes to test the claim that tomato seeds germinate faster when each individual seed is
the no. of grams of carbohydrates contained in 1-ounce servings of randomly selected chocolate and non chocolate candy
a researcher studies 45 volunteer citizens from a small community and asks them about the amount of caffeine in
Application of simple linear regression analysis to the estimation of a demand equation has yielded the following
Brain cancer is a rare disease. In any year there are about 3.1 cases per 100000 od population. Suppose a small medical insurance company has 150000 people on its books.
a casino game consists of a single toss of a fair die and pays as follows if the die comes up with an odd number the
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