1.30 Potassium from potatoes. The 2015 Dietary Guidelines for Americans¹³ notes that the average potassium (K) intake for U.S. adults is about half of the recommended amount. A major source of potassium is potatoes. Nutrients in the diet can have different absorption depending on the source. One study looked at absorption of potassium from different sources. Participants ate a controlled diet for five days, and the amount of potassium absorbed was measured. Data for a diet that included 40 milliequivalents (mEq) of potassium were collected from 27 adult subjects.¹⁴

1. (a) Make a stemplot of the data.

2. (b) Describe the pattern of the distribution.

3. (c) Are there any outliers? If yes, describe them and explain why you have declared them to be outliers.

4. (d) Describe the shape, center, and spread of the distribution.