Z value in caital budgeting

  step 1. find  if the differerence between the  value  and the mean  divided by std  deviation is + or -.

 if it is + it falls in right tail . if it is - it falls in left tail.

  step 2then  find the value  of z from table for eg if the  value  in stp 1 say +.2389. go to .23 of  of z valu table and see under 8. 

to  step 2 add 0.5 and multiply by 100 u get %

for - subtract frm .5 valu obtnd frm step 2