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In a simple random sample of 36 families in a certain country, you find that sample mean income to be $9,500 with a sample standard deviation of $2,500. Run a hypothesis test (?=.05) to test whether the population's mean exceeds $9,000. What is the p-value?
Of the adult books, 70 are nonfiction while 60 of children's books are nonfiction. If the book is selected at random, determine the probability that is is?
1 personal best finishing times for a particular race in high school track meets are normally distributed with mean
In order to test to see if there is any significant difference in the mean number of units produced per week by each of three production methods, the following data were collected:
The nighttime cold medicine Dozenol bears the label indicating the presence of 600 mg of acetaminophen in each fluid ounce of drug.
What proportion of the hearing loss in all the workers was attributable to not wearing earplugs?
At the .05 level, you are testing whether there is a significant difference in the proportions of college students and similar aged non college students having accidents during the two year period. Is this a test of sample means or sample proporti..
What type of probability distribution is presented? Find the probability that exactly 5 of his saplings will die in that first winter. Round to 4 decimal places. Find the probability that 5 or less of saplings will die in that first winter. Round to ..
suppose the time to prepare a bed at a hospital is modeled with a random variable with a mean of 20 mins and a variance
The mean noise level for 24 hospital operating rooms was 56.3 dBA and the standard deviation was 7.5 dBA. At α = .05 can it be concluded that there is a difference in means?
To find out whether living next to high-voltage power lines increases your chance of getting cancer, researchers selected various homes at random.
what method of probability assessment would most likely be used to assess the probability that a customer will return a
A local pizza parlor advertises that their average time for delivery of a pizza is within 30 minutes of receipt of the order. To check the accuracy of their claim, the delivery time for a random sample of 64 orders were recorded.
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