According to a University of wildlife ecology and conservation researcher, the average level of mercury uptake in wading birds in a region has increased over the past several years. Five years ago, the average level was 18 parts per million.
a. Give the null and alternative hypotheses for testing whether the average level today is than more 18 ppm.
A. H0: p = 18, H1: u != 18
B. H0: u != 18, H1: u < 18> c. H0: u <= 18, H1: u > 18
D. H0: u >= 18, H1: u < 18>
b. Describe a Type I error for this test.
c. Describe a Type II error for this test.