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Statistics_21_-_Fall_2003_-_Pham_-_Midterm_1

# Statistics_21_-_Fall_2003_-_Pham_-_Midterm_1 - Stat 21 Fall...

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Unformatted text preview: Stat 21 Fall 2003 Midterm 1 Open hook, SD minot: Show aii Wont: for foil credit. Keep 3 Frame your answers o'ecin'ieir pieces in caicoiations and ansWers. Problem 1 {'35 minutes, 35 ,oointsjI The following data are obtained for about moe men: average height: E39 inches, SD: 2.5 inches awerage forearm length: 18 inches, SD: 1 inch, e. 01” the men who were 6 feet taii than 18 inches? E. Di men who had 19 than 69.5 inches? C. A man's height is the 96th percentile of height distribution. Predict the percentile rank of his forearm. inches Forarms, about what percentage had height taller _ _,I' "" II LII _.._ I - .I‘-'!..l i,"'_-|| ,2 __ _ a, _|_. I._ - PE-‘ﬂes. |_ " Li K. .II -1 I. "I r 'l I,+f 'l I 1 .d i I ~r i- r__!. I I- i. I, _ ll _ I 0' 'rflz; I,“ _ .I l ‘l _ _ ___ _ ..| r..? I: _ E" K"; I f _ "- I I!- I'r-l I”. I_ ll I'll 1' _ I. _. -' F- T I J -| II,” ’| r I I r l I J. i' I‘- H II —. I . H_ n '— _- I _ I r I. | III.'.__] - I _ .1 .:_._ | ' I ' _ — L, I .5 .'.,. L _ . . "_.__ II. . -x |,'."';_ I II K. 33.5 I N}: 'I __ _ | I_ll I" _— —-T —__ _—— I 1,: E, a [-3- “ii-oil i. :1}; |ri ___—-— - erg-gm 27»; I 1" E! I “J: 'y ., _“Hf' e. I' — — - '5' ~— —' r l? a I' Phublem 2 {15 minutes, 15 points) _\ A. What is the correlation coefﬁcient for the data beiow {show all work) ----T----If.:l I LIV}: I AT} xii-f-[j—lx': -l I 't} —| " {I _ I q n 1 1 ‘53— "- —- —--—-- — _ -_ o 3 I {- 1 3" 7 I : F I '-'-..—-:- _ _T—'—,_. ———__ T": 'il. r: i I I; II I I“. — ﬂab! ‘_|I |_".i ._ "-J " '43:“ _I:II‘|_‘_ r.-_ _ _ | rI—IL ___ _F . -. ' 3 I "" l I |___ _ L“) B. If possible fill in the two bianks so that the correlation for the data below equals the correlation in part A. If this is not possible, explain why. ' _o-i—FFFFF ‘- 1}.— "'|‘|-'T-ai 1 ___ (it—"Wu" “ a" ﬁbril tag—4 :I -r- pl? (E, _H- _ I LILli f) _ s a 1—)] [if _ ‘ "1 1 —L—__,:-—\——'\— .- _ ":L 4" "--_.__ ____ ' — " I_'I_—_ - _I: - If. ' I If ' ': :— _. ix} _lr‘: .2“?— :i_. l;f§_ Yb” "-— _ ' 2 II :3. {I E I??? -H - 2 r - l”! a r __' ~ a a _ - ._ ‘ _IJ {1 . In rdfrp 'V- -| I' I'lf-i,I ...
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