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23 - Section 6.2 Inference for a Mean Question 13 of21 7/1 View Policies Current Attempt in Progress Transgender Adults A study1 of transgender adults examines the age at which they began to transition and the age of their earliest memories of gender dysphoria. (In this exercise, we examine the age beginning transition and in Exercise 6.107 we examine the age of their earliest memories.) In the study of 210 transgender adults, the mean age at which they began transitioning was 32.6 with a standard deviation of 18.2. Find a 95% condence interval for the mean age at which transgender adults begin transitioning. 1 Zaliznyak M, Bresee C, and Garcia MM, "Age at First Experienceof Gender Dysphoria Among Transgender Adults Seeking Gender- Afrming Surgery,\" JAMA Network Open, March 16,2020. Some of the data has been approximated from informationin the paper. Condence interval (round to three decimal places): a to n eTextbook and Media Save for Later Attempts: 0 of 4 used 6 23 - Section 6.2 Inference for a Mean Question 12 of2'l -.' 1 View Policies Current Attempt in Progress Forest Fires in Portugal A study of forest res in Portugal1 looked at the effect of many variables on the area of forest that is burned by the re. The study included 517 forest res and found a mean area burned of 12.85 hectares with a standard deviation of 63.66. (The standard deviation is much bigger than the mean because the data is very right-skewed.) Find and interpret a 90% condence interval for the mean area burned by all forest res in Portugal. (The data are available in ForestFires.) 1 Forest Fires Data Set, UCI Machine Learning Repository, https://archive.ic5.uci.ed'u/ml/datasets/Forest+Fires, Accessed February 2020. Condenceintervallround tothreedecimalplaces): a 8.236 to a 11454 Interpretation: v eTextbook a We are 90% condent that the mean area burned for all forest res in Portugal is between those two numbers. Save for Later We are condent that 90% of the forest res in this sample burn an area within those two numbers. We are 90% condent that the mean area burned for this sample of forest res in Portugal is between those two numbers. We are condent that 90% of forest res in Portugal burn an area within those two numbers. 15 using the sample results x = 17.2, s = 6.4, withn = 40. (a) Give the test statistic and the p-value. Round your answer for the test statistic to two decimal places and your answer for the p-value to three decimal places. test statistic = p-value = i e Textbook and Media (b) What is the conclusion? O Reject Ho. O Do not reject Ho. eTextbook and Media