The department of natural resources classifies a fish to be unsafe to eat if its polychlorinated biphenol (PCB) concentration exceeds 5 parts per billion (ppb). A random sample of 10 fish taken from a local lake resulted in the concentrations listed below. The population is known to have an approximately normal distribution.2.63.73.84.54.84.95.15.46.66.9At a 10% significance level, is there sufficient evidence to conclude that the mean PCB concentration for fish from this lake exceeds 5 ppb? Hint: ???? is unknown.Your answer should show assumptions, hypotheses, and conclusions.
