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QuestionCan you predict the price of your favorite stock shares based on a market index value? For a stock that has at least five years of history, develop a regression equation to predict its value if the index of your choice goes up by and if it goes down by 15% from its value on the day you do th ... Read More
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QuestionAn ice cream vendor sells three flavors: chocolate, strawberry, and vanilla. Forty five percent of the sales are chocolate, while 30% are strawberry, with the rest vanilla flavored. Sales are by the cone or the cup. The percentages of cones sales for chocolate, strawberry, and vanilla, are 7 ... Read More
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QuestionMothers Against Drunk Driving (MADD) is a very visible group whose main focus is to educate the public about the harm caused by drunk drivers. A study was recently done that emphasized the problem we all face with drinking and driving. Five hundred accidents that occurred on a Saturday night ... Read More
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QuestionThe average hourly wage of workers at a fast food restaurant is $6.50/hr with a standard deviation of $0.45. Assume that the distribution is normally distributed. If a worker at this fast food restaurant is selected at random, what is the probability that the worker earns more than $6.75? Su ... Read More
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QuestionIn a particular region of Cape Cod, it is known that lobstermen trap on average of 32 pounds of lobster per day with a standard deviation of four pounds. If a random sample of 30 lobster fishermen is selected, what is the probability that their average catch is less than 31.5 pounds?Summary ... Read More
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QuestionSuppose that the average weekly earnings for employees in general automotive repair shops is $450, and that the standard deviation for the weekly earnings for such employees is $50. A sample of 100 such employees is selected at random. Find the probability that the mean of the sample is betw ... Read More
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QuestionA popular retail store knows that the purchase amounts by its customers is a random variable that follows a normal distribution with a mean of $30 and a standard deviation of $9. What is the probability that a randomly selected customer will spend between $20 and $35 at this store? Summary ... Read More
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QuestionA set of final exam scores in an organic chemistry course was found to be normally distributed, with a mean of 73 and a standard deviation of 8. What is the probability of getting a score of 68 or less on this exam? Summary This short answer question belongs to Statistics and it is about ca ... Read More
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QuestionThe length of time to complete a door assembly on an automobile factory assembly line is normally distributed with mean 6.7 minutes and standard deviation 2.2 minutes. For a door selected at random, what is the probability the assembly line time will be between 5 and 10 minutes? Summary ... Read More
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Question1. The left half under the normal curve is slightly smaller than the right half.TrueFalse2. Using the standard normal curve, the Z- score representing the 5th percentile is 1.645.TrueFalseSummary These are objective questions discuss about normal curve. T ... Read More
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QuestionI. Few years ago, the average number of hours worked each week by general practitioners was known to be 49. A random sample of 29 general practitioners this year gives a mean of 52 hours per week, with a standard deviation of 4.3 hours. To test if the number of ... Read More
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QuestionA study reported on 6 patients with chronic myofascial pain syndrome. The mean duration of pain had been 3 years for the 6 patients and the standard deviation had been 0.5 year. Test the hypothesis that the mean pain duration of all patients who might have been selected for this study was gr ... Read More
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