Our partition shows that 800 of the 2000 customers in our test set own a tablet, while 230 of the 600 customers in our training set own a tablet. Test whether the partition is valid for this variable, using ???? = 0.10. Table 6.12 contains the counts for the marital status variable for the training and test set data. Test whether the partition is valid for this variable, using ???? = 0.10. TABLE 6.11 Summary statistics for duration of customer service calls Data Set Sample Mean Sample Standard Deviation Sample Size Training set x1 = 20.5 s1 = 5.2 n1 = 2000 Test set x2 = 20.4 s2 = 4.9 n2 = 600 TABLE 6.12 Observed frequencies for marital status Data Set Married Single Other Total Training set 800 750 450 2000 Test set 240 250 110 600 Total 1040 1000 560 2600