Allen’s hummingbird has been studied by zoologist Bill Alther. A small group of 15 Allen’s hummingbirds has been under study in Arizona. The average weight for these birds is x= 3.15 grams. Based on...

Allen’s hummingbird has been studied by zoologist Bill Alther. A
small group of 15 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 = 0.33grams. Find the sample size n necessary for an 80% confidence level with a maximal error of estimate e = 0.08 for the mean weights of the
hummingbirds.