In psychological statistic what is answer for this activity? And explain how you do it. Thank you!

Activity 1 1. A researcher is interested in the texting habits of high school students in the United States. If the researcher measures the number of text messages that each individual sends each day and calculates the average number for the entire group of high school students, the average number would be an example of a 2. A researcher is interested in how watching a reality television show featuring fashion models influences the eating behavior of 13-year-old girls. a. A group of 30 13-year-old girls is selected to participate in a research study. The group of 30 13-year-old girls is an example of b. In the same study, the amount of food eaten in one day is measured for each girl and the researcher computes the average score for the 30 13-year-old girls. The average score is an example of a 3. Statistical techniques are classified into two general categories. What are the two categories called, and what is the general purpose for the techniques in each category? 4. Briefly define the concept of sampling error