For Exercises 3.17 and 3.18 see page 130; for 3.19 and 3.20, see pages 131–132; for 3.21 and 3.22, see page 134; for 3.23 and 3.24, see page 136; and for 3.25, see page 138.
3.21 Ringtones for cell phones.
You decide to change the ringtones for your cell phone by choosing two from a list of the 10 most popular ringtones.12 Here is the list:
| Fancy | Happy | Turn Down for What | Rude | Problem |
| Bottoms Up | All of Me | Crise | Beachin’ | Wiggle |
Select your two ringtones using a simple random sample.