A researcher finds the ocean's acidity level in a certain region is 8.09 (more acidic than geologic record). From ocean floor core samples, she finds that the historical mean acidity in the region was 8.13 with a standard deviation of 0.026. She uses the data to conduct a test of hypotheses at the a = 0.01 significance level. describe type | error in context: what does she believe? and what is the reality