2.5 High click counts on Twitter. A study was done to identify variables that might produce high click counts on Twitter. You and nine of your friends collect data on all of your tweets for a week. You record the number of click counts, the time of day, the day of the week, the sex of the person posting the tweet, and the length of the tweet.

1. (a) What are the cases for this study?

2. (b) Classify each of the variables as categorical or quantitative.

3. (c) Classify each of the variables as explanatory, response, or neither. Explain your answers.