The 2013 unemployment rates of countries in the European Union shown in Exercise 2.63 ranged from 4.9 to 27.3, with Q1 = 7.15, median = 10.15, Q3 = 13.05, a mean of 11.1, and a standard deviation of 5.6.
a. In a box plot, what would be the values at the outer edges of the box, and what would be the values to which the whiskers extend?
b. Which two countries will show up as outliers in the box plot? Why?
c. Greece had the highest unemployment rate of 27.3. Is it an outlier according to the 3 standard deviation criterion? Explain.
d. What unemployment value for a country would have a z-score equal to 0?