Using What-If Analysis, you can visualize the effects of different variables, making it easier to assess risks and opportunities. In Excel, three primary tools are available for performing What-If ...

See how to use data.table's special .SD symbol to perform calculations and other tasks by group ...

In this KS1 Maths article you'll learn how to read data tables and tally charts. We also have KS1 videos, a quiz and lots of examples.