Question: Biology and Environmental Science The Castaic Lake reservoir provides water for the northern portion of the Greater Los Angeles Area. A random sample of days during Summer 2013 was obtained and the capacity of the lake on each day (in thousands of acre feet) was measured.
a. Suppose the historic mean capacity during the summer is 277 thousand acre feet. Is there any evidence to suggest that the true population mean capacity has decreased? Assume normality and use a = 0.05.
b. Find the p value associated with this hypothesis test.