Hi, I have problems interpolating with statistical tables. If I get a value to look up in the table which is not listed in it how do I go about getting the correct table value for it?
your correct... you do it by interpolation. phi( 0.92 ) = A phi( 0.93 ) = B (from tables) and you want phi( 0.92245 ) or something similar X - A = 0.92245 - 0.92 B - A 0.93 - 0.92 and solve for X to get the value you want
Use a calculator! There are a number of calculators, which are allowed in the examination, that do normal probabilities. For example: Casio FX991-ES Casio FX570-ES Sharp EL520 WB Sharp EL530 VB Sharp EL506WB These'll save time!
