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Key: $\overline{)11}4$means 11.4%

If we had not split the stems, all data values would have been placed on only six stems (11, 12, 13, 14, 15, 16), making it difficult to determine the general shape of the distribution.

As a result, we divided the stems in order to determine the general shape of the distribution.

The data values represent the percentage of residents aged 25 to 34 in each of the 50 states, according to what we've been told.

Let us use the key with the largest data value, which is given at the bottom of the stemplot and is thus 1610. Because the percentage must be between 0% and 100%, this most likely means that the corresponding state has 16.0 percent residents aged 25 to 34. (and as 1.60 percent is probability to small a percentage).

The following is a possible key:

Key: The state of $\overline{)16}0$has 16.0 percent of its residents aged 25 to 34.

Because most of the data values appear to lie roughly in the middle of the stemplot, the distribution has a roughly symmetric shape.

There is a gap in the stemplot between 1610 (which represents 16.0 percent) and the other data values in the stemplot, implying that 16.0 percent could be an outlier.

As a results:

Roughly symmetric

16.0% is a possible outlier.