The article Frost Belt Feels Labor Drain (USA Today, May 1, 2008) points out that even though

The article €œFrost Belt Feels Labor Drain€ (USA Today, May 1, 2008) points out that even though total population is increasing, the pool of young workers is shrinking in many states. Each entry in the accompany ing table is the percent change in the population of 25- to 44- year- olds from 2000 to 2007. A negative percent change means a state had fewer 25- to 44- year- olds in 2007 than in 2000.

a. The smallest value in the data set is 211.9, and the largest value is 22.0. One possible choice of stems for a stem- and- leaf display would be to use the tens digit, resulting in stems of 21, 20, 0, 1, and 2. Notice the two 0 stems€” one is for the negative percent changes between 0 and 29.9, and one is for the positive percent changes between 0 and 9.9. Construct a stem- and- leaf plot using these five stems.
b. The article described €œ the frost belt€ as the cold part of the country€” the Northeast and Midwest€” noting that states in the frost belt generally showed a decline in the 25- to 44- year- old age group. How would you describe the group of states that saw a marked increase in the number of 25- to 44- year- olds?

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