posters some questions & answers of sorts, page-36

Charlie,

JORC used hundreds of drill holes in its analysis.

BULK SAMPLE used just a handful of holes that showed a high grade.

That in itself explains why the answers come out as they do.

For example if out of 100 students you have 4 that score 95 and 96 that score 50, the average of the 100 students will be just above 50.

Select the top 4 students and their average will be 95. Quite a difference!

Selective data tells you a lot about what you have selected rather than the overall picture.