A group of researchers wants to see if an educational campaign will reduce the hours a day that teenagers spend on social media. To test their research question, they design a study using two groups of high school students. One group of students completes a six-session program educating them on the negative effects of social media. The other group receives no eductional program. After the six-week program, the average number of hours spent on social media for one week was recorded for students in both groups. Using = .05, determine whether the intervention significantly decreased the average number of hours on social media.

Intervention	No Intervention
n = 11	n = 11
M =7.1	M = 4.5
SS = 108	SS = 112

1. Identify the independent variable.

2. Identify the dependent variable.

3. State the null and alternative hypothesis . You can use words or notation.

4. Identify the critical boundary for the research question

5.Calculate

• Include answer for pooled variance
• Include answer for standard error
• Include answer for t-score

6. Summarize your results, including research notation, your decision and an explanation

7. Calculate and interpret r² (even if not significant)

8.What else could explain the difference between the samples (confounding or extraneous variables - think groups not just individual people)?