The file S02_44.xlsx contains annual data on the percentage of Americans under the age of 18 living below the poverty level.
a. In which years of the sample has the poverty rate for American children exceeded the rate that defines the third quartile of these data?
b. In which years of the sample has the poverty rate for American children fallen below the rate that defines the first quartile of these data?
c. What is the typical poverty rate for American children during this period?
d. Create and interpret a time series graph for these data. How successful have Americans been recently in their efforts to win “the war against poverty” for the nation’s children?
e. Given that this data set is a time series, discuss whether the measures requested in parts a-c are very meaningful at the current time.