Some experts believe that 19% of all freshwater fish in a country have such high levels of mercury that they are dangerous to eat. Suppose a fish market has 250 fish tested, and 41 of them have dangerous levels of mercury. Test the hypothesis that this sample is not from a population with 19% dangerous fish, assuming that this is a random sample. Use a significance level of 0.05. determine the z-test statistic, find the p-value
