We carry out a chi-square test of independence, the chi-square statistic is based on (rxc) -1 degrees of freedom, where r and c denote, respectively, the number of rows and columns in the contingency table.

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step-by-step explanation:

yes

step-by-step explanation:

so of course you want to start by plugging the 5 in which goes to 7(5)+3(5)=50 because 7*5=35 and 3*5=15 and then add them together, then plug in the 5 to the other equation as well 9(5)+5=50 because 9*5= 45 and then add 5 and so yes they are equivalent.

2

step-by-step explanation:

a king of hearts and a 2 of spades