1. Personal smartphones collect data about users. One such piece of data is "screen time per week." We would like to assess if average screen time per week is the same for three age groups of users: "teens" "young adults" and "middle-aged adults"

What procedure would be best for this question?

1. one proportion
2. two proportion
3. one mean
4. paired mean
5. two independent mean
6. ANOVA
7. Chi-Square test of independence
8. Chi-Square goodness of fit
9. Linear Regression