A psychologist believed that as children get older, they engage in more "inactive activities" such as playing computer games, watching TV, and surfing online. She tested whether there was a relationship between age (X) and amount of activity per week (Y) in a sample of 10 participants. Compute an analysis of regression for this hypothetical study and make a decision to retain or reject the null hypothesis.

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Age (years) Amount of Activity (hours) 4.3 3.2 1.0 1.5 1.2 0.8 3.0 4.0 1.5 1.9 10 13 12 15 12 15 14