Suppose for Every Email Message That You Receive in the Next

Essay

Suppose for every email message that you receive in the next week, you keep track of
- Whether the message is spam
- Whether the sender is a family member, a friend, or someone else
- Whether the message contains an emoticon (such as a smiley face )
- How many words are in the message
- What day of the week the message was sent
-What are the observational units in this study?