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Stopping a rollout early based on JSD

Posted By: Tom Keith
Date: Thursday, 12 May 2011, at 12:40 p.m.

In Response To: Stopping a rollout early based on JSD (Ian Shaw)

If the difference between the plays would be 1.65 jsd on completion of 1296 trails, the chance that the setting [minimum 324m cutoff 2.5 jsd] gives the wrong result is 0.05014 (or 5.015%). "Wrong" means ranking the plays in the reverse order.

Yes, that's right.

When setting up a cutoff rollout, there still seems to be the problem of knowing what the jsd would be on completion.

Do you mean in the simulation? In the simulation, I knew what the standard deviation of the plays was and could calculate ahead of time what the expected jsd was based on the distance between the plays.

Messages In This Thread

• Stopping a rollout early based on JSD
  Tom Keith -- Sunday, 8 May 2011, at 2:57 p.m.
  • Stopping a rollout early based on JSD
    Ian Shaw -- Tuesday, 10 May 2011, at 4:11 p.m.
    • Stopping a rollout early based on JSD
      Tom Keith -- Wednesday, 11 May 2011, at 11:43 a.m.
      • Stopping a rollout early based on JSD
        Ian Shaw -- Wednesday, 11 May 2011, at 1:27 p.m.
        • Stopping a rollout early based on JSD
          Tom Keith -- Thursday, 12 May 2011, at 12:40 p.m.
  • Stopping a rollout early based on JSD
    Chuck Bower -- Thursday, 12 May 2011, at 4:25 p.m.
    • Stopping a rollout early based on JSD
      Tom Keith -- Thursday, 12 May 2011, at 9:27 p.m.