Allen's hummingbird ( Selasphorus sasin ) has been studied by zoologist Bill Alther.† Suppose a small group of 16 Allen's hummingbirds has been under study in Arizona. The average weight for these...


Allen's hummingbird (Selasphorus sasin) has been studied by zoologist Bill Alther.† Suppose a small group of 16 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 ? = 0.38 gram.

When finding an 80% confidence interval, what is the critical value for confidence level? (Give your answer to two decimal places.)


zc =



(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


















Find the sample size necessary for an 80% confidence level with a maximal margin of errorE = 0.12 for the mean weights of the hummingbirds. (Round up to the nearest whole number.)

  hummingbirds




Jun 08, 2022
SOLUTION.PDF
SOLUTION.PDF

Get Answer To This Question

Related Questions & Answers

More Questions »

Submit New Assignment

Copy and Paste Your Assignment Here
Have files?