Q1. Data were collected on the number of visitors of a shopping mall. The data are presented in the following table. Month No. of visitors Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 22 30 25 38...

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Extracted text: Q1. Data were collected on the number of visitors of a shopping mall. The data are presented in the following table. Month No. of visitors Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 22 30 25 38 25 42 41 46 27 57 50 60 (a) Find the lag 2 autocorrelation coefficient (r2) and interpret the result. (b) Develop a hypothesis test to determine whether the lag 2 autocorrelation coefficient is significantly different from zero.