Allen's hummingbird (Selasphorus sasin) has been studied by zoologist Bill Alther.Suppose a small group of15Allen's hummingbirds has been under study in Arizona. The average weight for these birds isx= 3.15 grams.Based on previous studies, we can assume that the weights of Allen's hummingbirds have a normal distribution, with=0.36gram.(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 limitupper limitmargin of error