Medicare spending per patient in different U.S. metropolitan areas may differ. Based on the sample data below, answer the questions that follow to determine whether the average spending in the northern region is significantly less than the average spending in the southern region at the 1 percent level. 1) Specify decision rule. Reject the null hypothesis if tcalc <____ 2) Find the test statistic tcalc assuming unequal variances  Medicare Spending per Patient (adjusted for age, sex, and race)   Statistic Northern Region Southern Region   Sample mean $4324 $7,426   Sample standard deviation $1,537 $3,495   Sample size 11 patients 18 patients

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