During 2011 a company implemented a number of policies aimed at reducing the ages of its customers€™ accounts. In order to assess the effectiveness of these measures, the company randomly selects 10 customer accounts. The average age of each account is determined for each of the years 2010 and 2011. These data are given in Table 17.17. Use a non-parametric technique to attempt to show that average account ages have decreased from 2010 to 2011. Use α = .05.

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Average Account Ages in 2010 and 2011 for 10 Randomly Selected Accounts os AcctAge TABLE 17.17 Average Age of Account in 2010 Average Age of Account in 2011 Account (Days) (Days) 35 27 24 19 3 47 40 4 28 30 41 33 6. 33 25 35 31 51 29 18 15 10 28 21