SAT 158

Page:98

(7) Graduation Rates The following relative frequency ogive represents the graduation rate of all four-year universities in the United States.

(a) What is is the class width.

(b) Approximately 10% of all four-years universities have a graduation rate below what level?

(c) What percentages of all four-year universities have a graduation rate less than 59.99%?

(d) Five percent of all four-year universities have a graduation rate above what level.

Page:98

(9) The following times series plot shows the annual unemployment and inflation rate for the years 1992 through 2014.

(a)Estimate the unemployment rate in 2011.

(b) In what year was the unemployment rates highest?

(c) In what year was the inflation rate highest?

(d) In what year were the unemployment rate and inflation rate closest? furthest?

(e) The misery index is defined as the sum of the unemployment rate and inflation rate. According to the misery index which year was more "miserable", 1999 or 2014?

(d) Comment on the trend in the misery index since 2010.