Also for 4f I kinda messed up, I put the sd doesn't change, mean will decrease by 5, LQ and UP will decrease by 5 therefore IQR will also decrease by 5. Stupid mistake I know, but will I lose marks?
Made a stupid error on the box plot, used the Upper Quartile instead of the lower quartile for the score exceeded by 75%. Also for some reason when I calculated Var(x) I got 1.91 so I've lost another mark there, should hopefully pick up follow through marks though. Solid paper 73/75 or 72/75 I think.
dont think so cos the s.d isnt affected by subtraction/addition ?
If you refer to the formula though I thought maybe it would, but perhaps that would me the value of fx^2/sum of f would be lower to compensate for it, well there's another mark down the drain
For venn diagram got shape and intersections right but forgot other values in the circles. also miscalculated the sum of midpoints. how many marks lost? please reply