Two out of three of these Dow stocks could be good picks for investors to buy on the dip.The Dow Jones Industrial Average climbed 1.8% in August. That's a great performance, especially considering the widely followed index is up roughly 8.5% year to date.However, several Dow stocks fell last month. Is it time to buy August's worst-performing Dow Jones stocks?1. IntelIntel (INTC -8.80%) stood out by far as the worst Dow stock last month. Shares of the chipmaker plunged 28% in August and are down close to 60% ...