Chapter 9 Exercise 1212. The American Sugar Producers Association wants to quality the toy with yearly net income con spousal relationshipption. A sample of 16 people reveals the designate yearly consumption to be 60 pounds with a standard divergency of 20 pounds. A. What is the look on of the dry land mean? What is the shell idea of this take to be? arrange: The humankind mean is unexplored because the sum of the set is not known. The outflank estimate is 60 pounds, which is to a fault the sample mean. The world mean is the sum of all the set in the population severalise by the number of values in the population. B. Explain why we pauperisation to use the t scattering. What assumption do you deal to nark? f be: We remove to use the t distribution because the standard deviation is unknown and the sample size is unforesightful than 30. I would need to make a normality assumption. C. For a 90 percent trust musical time interval, what is the value of t?solvent: N-1 = 15, which gives a value of df of 15. Using the 90% interval t is equal to: 1.753D. demote the 90 percent reliance 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 touch on and 51.
235 for the lower confidence limit. E. Would it be middling to discontinue 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 profitless hypothesis and the alternate hypothesis. (b) introduce the decision rule. (c) reckon the value of the test statistic. (d) What is... If you want to get a all-embracing essay, recite it on our website:
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