13. A recent poll of 2400 randomly selected 18-25-year-olds revealed that 278 currently use marijuana or hashish. According to a publication, 12.6 % of 18-25-year-olds were current users of marijuana...

Extracted text: 13. A recent poll of 2400 randomly selected 18-25-year-olds revealed that 278 currently use marijuana or hashish. According to a publication, 12.6 % of 18-25-year-olds were current users of marijuana or hashish in 1997. Do the data provide sufficient evidence to conclude that the percentage of 18-25-year-olds who currently use marijuana or hashish has changed from the 1997 percentage of 12.6%? Use a = 0.05 significance level. test statistic z = positive critical z score negative critical z score The final conclusion is A. There is not sufficient evidence to conclude that the percentage of 18-25-year-olds who currently use marijuana or hashish has changed from the 1997 percentage of 12.6%. B. There is sufficient evidence to conclude that the percentage of 18-25-year-olds who currently use marijuana or hashish has changed from the 1997 percentage of 12.6%.