Blog posts



Selection bias – a war story

2 minute read

During the Second World War, in a secret Manhattan building, statisticians and mathematicians were recruited from across the U.S.A. to carry out data analysi...

Comparing data from two different sources

less than 1 minute read

Suppose you have data, but with many missing observations. You find a new data source that overlaps but has the potential for new observations or new values....

Some history of sampling

4 minute read

Statistical enumerations of land, people, and property have taken place in many of the better organized empires and states since Babylonian times. These all ...

Variants of random sampling

1 minute read

There are many variations on random sampling that aim to further improve representation or reduce the costs of data collection.