HW1_sol - ISyE 2028A, Summer 2010 HW 1 Solution 1. 19...

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Unformatted text preview: ISyE 2028A, Summer 2010 HW 1 Solution 1. 19 summationdisplay i =1 x i = 272 . 82 , 19 summationdisplay i =1 x 2 i = 10333 . 8964 . The sample mean ( x ) = 19 i =1 x i 19 = 14 . 359 , The sample var. ( s 2 ) = 19 i =1 x 2 i- ( 19 i =1 x i ) 2 / 19 19- 1 = 356 . 47 , The sample s.d. ( s ) = 356 . 47 = 18 . 88 . 2. 9 summationdisplay i =1 x i = 748 , 9 summationdisplay i =1 x 2 i = 62572 . The sample mean ( x ) = 9 i =1 x i 9 = 83 . 11 , The sample var. ( s 2 ) = 9 i =1 x 2 i- ( 9 i =1 x i ) 2 / 9 9- 1 = 50 . 61 , The sample s.d. ( s ) = 50 . 61 = 7 . 11 . Dot diagram 70 75 80 85 90 95 100-0.1 0.1 3. (a) A stem-and-leaf plot with increment size 500 (by MINITAB): Stem-and-leaf of x N = 70 Leaf Unit = 100 1 3 10 777788899 (28) 1 0000000111112222222333344444 32 1 555555555566667777777888899 5 2 01122 (b) No, only 5 out of all (70) survived beyond 2000. 1 4. 37 summationdisplay i =1 x i = 2435 , 37 summationdisplay i =1 x 2 i = 160409 ....
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This note was uploaded on 09/02/2010 for the course ISYE 2028 taught by Professor Shim during the Summer '07 term at Georgia Institute of Technology.

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HW1_sol - ISyE 2028A, Summer 2010 HW 1 Solution 1. 19...

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