Need problem solving process and the steps version 2 Questions 16 - 18 It is desired...
Need problem solving process and the steps
version 3 Questions 16 - 18 A survey of 100 businesses revealed that the mean after-tax profit was $80,000 and the standard deviation was $12,000. You would like to formally estimate the population mean after-tax profit of a business. Q16 Suppose that you use the sample mean as the estimator. Find the standard error of the estimator. (a) 80,000 (b) 12,000 (c) 1,200 (d) 120 (e) 800 Answer (c) 1200 Q17 Find the...
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version 3 Questions 19 - 20 A medical researcher is interested in the percentage of doctors who recommend aspirin rather than other pain killers for their patients with headaches. A random sample of 100 doctors results in 10 who indicate that they recommend aspirin. Use the following approximations: 70.16 = 0.4, 0.09 = 0.3, 12011 and 145 12. Q19 Determine the 99% confidence interval for the proportion of doctors who recommend aspirin. (a)...
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version 3 Questions 14 - 15 In the last election, a state representative received 30% of the votes cast. One year after the election, the representative organized a survey that asked a random sample of 100 people whether they would vote for her in the next election. Assume that her popularity has not changed since the last election. Use the following approximations: 0.15 0.39, 0.21 0.46, 0.3 0.55, and 0.7 0.84. Q14 Let...
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version 3 Questions 06 - 08 Intelligence Quotient (IQ) is a standardized test score designed to assess intelligence. The IQ score is standardized so that the mean is 100 and the standard deviation is 15. Assume that the standardized IQ score follows a normal distribution. Q06 What is the probability that the IQ is between 82 and 109? (a) 70.738% (b) 61.068% (c) 53.325% (d) 46.618% (e) 37.971% Answer (b) Q07 Suppose that...
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version 2 Questions 06- 08 Suppose that a tire company developed a new steel-belted radial tire. Let X be the number of miles the tires will last. From road tests, the company estimated that the mean of tire mileage is 39,000 and the standard deviation is 4,000. In addition, the mileage is normally distributed. Use the standard normal distribution table to answer the following questions. Q06 What is the probability that a tire...
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version 2 Questions 09 - 10 Assume that the number of calories in a McDonald's Egg McMuffin is a normally distributed random variable with a mean of 290 calories and a standard deviation of 10 calories. Q09 What is the probability that a McDonald's Egg McMuffin contains between 275 and 310 calories? (a) 91.044% (b) 86.639% (e) 77.454% (d) 70.657% (e) 62.466% Answer (a) 91.044 Q10 What is the 25-percentile, i.e. bottom 25%...