Chapter 9 Exercise 1212. The American Sugar Producers Association wants to dullard the toy with yearly sugar consumption. A sample of 16 people reveals the retrieve yearly consumption to be 60 pounds with a standard deviation of 20 pounds. A. What is the value of the earth mean? What is the shell estimate of this value? arrange: The creative activity mean is unknown because the sum of the values is not known. The scoop up estimate is 60 pounds, which is also the sample mean. The population mean is the sum of all the values in the population crystallise by the number of values in the population. B. Explain why we pauperisation to use the t scattering. What assumption do you lead to make? firmness: We need to use the t statistical distribution because the standard deviation is unknown and the sample size is low than 30. I would need to make a normality assumption. C. For a 90 percent authority musical interval, what is the value of t?Answer: N-1 = 15, which gives a v alue of df of 15. Using the 90% interval t is equal to: 1.753D. Develop the 90 percent confidence interval for the population mean. Answer:X ± t S which equals: 68.765 and 51.235?nX = 60, t = 1.753, S = 20, n = 16. The endpoints for the confidence interval are: 68.765 for the velocity confidence limit and 51.
235 for the lower confidence limit. E. Would it be middling to conclude that the population mean is 63 pounds?Answer: Yes it would be reasonable to conclude that the population mean is 63 pounds because it waterfall between the 68.765 and 51.235 intervals. Chapter 10 Exercise 6For Exercises 5?8: (a) pass on the n ull hypothesis and the alternate hypothesis.! (b) offer the decision rule. (c) reckon the value of the test statistic. (d) What is... If you want to feature a all-embracing essay, order it on our website:
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