The report of a research study on a new medication to treat hypertension included this statement: "there was no significant difference in gender or age between the treatment and control groups." based on the statement, the reader of the report recognizes that gender and age were

by using  production possibilities graph.  opportunity costs are key expenses in financial matters and are utilized as a part of registering money saving advantage investigation of a venture. such expenses, be that as it may, are not recorded in the record books but rather are perceived in basic leadership by processing the money costs and their subsequent benefit or misfortune.