Find an 80% confidence interval for the average weights of Allen's hummingbirds in the study region. What is the margin of error?
To find a confidence interval for the average weight of Allen's hummingbirds in the study region, you will need a point estimate for 𝜇, and you will either need to know the population standard deviation or estimate it.
The point estimate for 𝜇 is
= x = .
The distribution of the weights is assumed to be normal with a known population standard deviation of 𝜎 =