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Question: The mean age of graduate students at a University is at most 31 y ears with a standard deviation of two years. A random sample of 15 graduate students is taken. The sample mean is 32 years and the sample standard deviation is three years. Are the data significant at the 1% level? The p-value is 0.0264. State the null and alternative hypotheses and interpret the p-value.
Problem: 10.5% of the population is 65 or older. Find the probability that the following number of persons selected at random from 25 people are 65 or older.
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?
Solve using the square root property: Radicands must be enclosed within
the makers of a soft drink want to identify the average age of its consumers. a sample of 55 consumers was taken. the
Petroleum is cracked to make gasoline and other products such as lubricating oil and kerosene.The process is too slow to allow sample sizes greater than one. The following are the octane rating of the output from the process recorded at intervals..
the growth of children from early childhood through adolescence generally follows a linear pattern. data on the heights
The overall maintenance budget over the life cycle is $C. Other constraints are that the total benefit must be at least a certain threshold, R units. What kind of knapsack problem is exemplified by this problem? Give reason for your answer.
let f be a forest of order n containing k connected components. prove that f contains n-k
a supplier contract calls for a key dimension of a part to be between 1.88 and 2.12 cm. that is a part will not be
Pets. Researchers at the National Cancer Institute released the results of a study that investigated the effect of weed-killing herbicides on house pets.
What is the probability that a randomly selected exam will have a score of at least 71 - What percentage of exams will have scores between 89 and 92?
a box contains 10 screws three of which are defective. two screws are drawn at random. find the probability that
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