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Let R be a unique factorization domain then show that prime element R generates a prime ideal.
Suppose we want to conduct a poll to estimate the proportion of voters who approve of the current mayor, and we plan to use a 95% confidence interval for our estimate.
Scores are obtained from the Law School Admission Test (LSAT) are normally distributed with a mean score of 550 and a standard deviation of 110.
A tube of Listerine Tartar Control tooth paste contains 4.2 ounces. As people use the tooth paste, the amount remaining in any tube is random.
A DVD rental store wants to know what proportions of its customers are under age 21. A simple random sample of 500 customers was taken, and 375 of them were under age 21. Presume that the true population proportion of customers under age 21 is 0.6..
Identify each of the random variables as continuous or discrete.
Find the probability that a random selected score is between 150 and 157. If a sample of size n = 100 is randomly selected, find the probability that the sample mean will be between 150 and 157.
To demonstrate the effectiveness of the drug, a researcher selects a sample of n = 25 children diagnosed with the disorder and measure each child's attention span before and after taking the drug.
Say a fast-food franchiser is considering building a restaurant in a local mall. According to franchise headquarters, a site is acceptable only if the number of pedestrians passing the location averages more than 100 per hour.
Which are likely to be independent events? For those you think are not, suggest reasons why.
Using WSJ or IBD look up the following stocks: General Electric, General Motors, Microsoft and Intel and answer the following questions for each stock. You may have to refer to several issues of your newspaper for all of the information if the pap..
Individual loss amounts (ground up) this year follow an inverse Weibull distribution with τ= 3 and expected value 1000. Next year you con?fidently expect loss amounts to in?ate by 10% uniformly across the board.
How much do typical employee and his or her family spends per year on dental expenses? Sample of 45 employee reveals mean amount spend last year was $1,820, with standard deviation of $ 660.
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