An economist believes that a typical basket of weekly food, bought by a family of four, costs more in Eastville than in Weston. Seven stores are randomly selected in each of these two towns and the cost of the basket recorded (in $).

Calculate the 95% confidence interval for the difference in means, assuming the costs are normally distributed.

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Eastville 13.21 13.97 13.76 13.11 13.25 13.98 13.03 Weston 12.93 13.13 12.98 13.01 12.99 13.21 13.01