How Do I Set A Radio Button Value, Based on Another Button's Value?

I'm having trouble getting this to work. I can clear the Approve radio button value with .prop("checked", false);, but can't set its value (initially empty) using the method marked in red below:

var DecisionRB = NWF$('#' + Decision);

DecisionRB.click(function() {
if (DecisionRB.val()=="Recommend") {
NWF$('#' + Approve[value="No"]).prop("checked",true);
}
})