1. Any statistical investigation must necessarily be based on accurate data:true or false.<br />2.Primary data refer to information which is gtahered directly from an original source : true or false.<br />3.Original source are based on second-hand experience :true or false.<br />4.Secondary data refer to information which are taken from unpublished data: true or false.<br />5.Materials obtained directly from original source have lesser degree of precision: true or false.<br />6.Primari data ar more life-like interesting,nad relevant: true or false.<br />7.There are no occations,however,when primary data are not available: true or false.<br />8.Indirect method of collecting is time-consuming:true or false.<br />9.Questionnares may be mailed or hand-carried: true or false.<br />10.There are less probability of non-response if questionnares are mailed: true or false.<br /><br />Plsssssssssss answer <br />nonsense:block!<br />​