The marital status of the household head and the type of housing have been observed for a random sample of families in the Province of Barcelona. The following results have been obtained. Working with a 95% confidence level, we want to check if it can be considered that there is some type of association between both variables. Property Rental TOTAL owned apartment Single 65 15 80 Married 78 12 90 TOTAL 143 27 170 Calculate the test statistic