Problem Set #7

Problem Set #7 - 1) a. - = Pz 1 . 0 1587 b. - = - . = . Pz...

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Unformatted text preview: 1) a. - = Pz 1 . 0 1587 b. - = - . = . Pz 1 1 0 1587 0 8413 c. - . = - . = . Pz 1 5 1 0 0668 0 9332 d. - . = - . = . Pz 2 5 1 0 0062 0 9938 e.- < = . -. = . P 3 z 0 0 5 0014 0 4986 2) a. = = -. = . Px 820 Pz 1 1 8413 0 1587 b. = . = . Px 790 Pz 0 5 0 3085 c. = . = . Px 825 Pz 1 25 0 8944 d. = - . . = .- . = . P775 x 830 P 1 25 z 1 5 0 9332 0 1056 0 8276 3) a. 80 th percentile = 0.84 standard deviations from the mean = 600 + 100(0.84) = 684 b. 30 th percentile = -0.52 standard deviations from the mean = 600 + 100(-0.52) = 548 c. exceeds 40% = -0.25 standard deviations from the mean = 600 + 100(-0.25) = 575 d. exceeded by 40% = -0.26 standard deviations from the mean = 600 + 100(-0.26) = 574 4) a. < = <- . = . Px 1000 Pz 1 83 0 0329 b. =- . . = .- . = . P1000 x 2000 1 83 z 1 5 0 9332 0 0336 0 8996 c. 95 th percentile or higher = 1.65 or more standard deviations from the mean = 1550 + 300(1.65)= 2045 fatal crashes or more300(1....
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Problem Set #7 - 1) a. - = Pz 1 . 0 1587 b. - = - . = . Pz...

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