1.In August of 2019, the proportion of teens vaping nicotine was reported to be 28% of all teens in America. The data was collected from a random sample with a normal distribution that has a margin of error of 2.6% and a 95% confidence level.

A.Verify the conditions.

B.Use the margin of error to find the lower and upper limits of the confidence interval (you do not need GeoGebra).

C.Write a conclusion in the context of the problem.

2.In 2013 the General Social Survey randomly asked 1,962 adults how many years of education they had.The sample mean was 13.72 years with a standard deviation of 3.14 years.Construct a 98% confidence interval for the mean number of years of education an adult has.Round all answers to two decimal places.

A.Verify the conditions.

B.State interval and upload the GeoGebra image.

C.Interpret interval in the context of the problem.