June 22 (Reuters) - Splunk Inc said on Tuesday that private equity firm Silver Lake invested $1 billion in the data analytics software firm. Silver Lake will invest the amount in convertible notes and its Chairman Ken Hao will join Splunk"s board, making him the eleventh member. (bwnews.pr/35KICrf) Reporting by Chavi Mehta in Bengaluru; Editing by Bernard Orr Our Standards: The Thomson Reuters Trust Principles.