WebAssign Stats final spring 2021 - MATH_ Grades - MATH 2210-65 Gene HW 9 (chapter 8) - Zimmerma 4. [0.2/1.25 Points] DETAILS PREVIOUS ANSWERS BBBASICSTAT8 8.1.015. MY NOTES PRACTICE ANOTHER Allen's hummingbird (Selasphorus sasin) has been studied by zoologist Bill Alther.I Suppose a small group of 19 Allen's hummingbirds has been under study In Arizona. The average weight for these birds Is x = 3.15 grams. Based on previous studies, we can assume that the weights of Allen's hummingbirds have a normal distribution, with o = 0.26 gram. (a) Find an 80% confidence Interval for the average weights of Allen's hummingbirds In the study region. What is the margin of error? (Round your answers to two decimal places.) lower limit upper limit margin of error (Select all that apply.)