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Question 36 2 pts Inorganic phosphorous is a naturally occurring element in all plants and animals, with concentrations increasing progressively up the food chain. Geochemical surveys take soil samples to determine phosphorous content (in ppm, parts per million). A high phosphorous content may or may not indicate an ancient burial site, food storage site, or even a garbage dump. The Hill of Tara is a very important archaeological site in Ireland. It is by legend the seat of Ireland's ancient high kings. Independent random samples from two regions in Tara gave the following phosphorous measurements (ppm). Assume the population distributions of phosphorous are mound-shaped and symmetric for these two regions. Region 1: 850 775 770 345 810 800 800 890 840 820 540 850 820 640 Region II: 810 770 740 375 820 810 810 870 820 815 560 820 Find a 95% confidence interval for the mean difference ul - /2 STAT, TESTS, 2SAMPtInterval (-75.32, 74.12) O (-75.32, -74.12) O (74.12, 75.32) O (-74.12, 75.32) (-115.19, 119.73)