## Statistics (12th Edition)

Without bolt-on trace elements: c = 260, d = 290, 1/d-c = 1/30 $P(280 \leq x \leq 284) = 1/30. ∫_{280}^{284} dx$ = 1/30. (284-280) = 0.1333 With bolt-on trace elements: c = 278, d = 285, 1/d-c = 1/7 $P(280 \leq x \leq 284) = 1/7. ∫_{280}^{284} dx$ = 1/7. (284-280) = 0.0.5714