For Exercises 13.1 and 13.2, see page 651; and for 13.3 and 13.4, see pages 655-656.
13.2 Spam process.
Most email servers keep inboxes clean by automatically moving incoming mail that is determined to be spam to a “Junk” folder. Here are the weekly counts of the number of emails moved to a Junk folder for 10 consecutive weeks:
194 | 227 | 201 | 152 | 202 | 178 | 229 | 202 | 247 | 155 |
Answer the following parts without the aid of software.