<prompt> Translate the following text to EnglishUchambuzi wa uchunguzi wa hifadhidata kubwa mara nyingi hutumiwa kuchagua idadi ndogo ya vigezo kwa ajili ya majaribio ya ziada, kwa msingi wa mifumo ya kuvutia ambayo ilitokea kutoka kwa mchanganyiko mbalimbali wa vipengele vya hifadhidata kubwa.  <response>: Exploratory analyses of large data bases are often used to select a smaller number of variables for additional testing, on the basis of interesting patterns that emerged from various combinations of the elements of the large data base. 