Question 58914
I used a TI-83 to generate these results.
Put the big numbers in L1; put the p's in L2.
I put the product of L1*L2 in L3 and ran 1-VAR
STATS on it to get:
Expected Value or x-bar=0.6*1000+0.3*1200+0.1*1500-370
sx=225.166605
sigmax= 183.8477631
Cheers,
Stan H.