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Unformatted text preview: will What 15 a weakness of Cramer’ s V? M an OLE-ha manly MAIN H15 Mﬂwd 6? [UM/keen}, \I (1.595 ELL } PVC- mm; i AL'J‘C. 93“ Tile standard deviation of the following four numbers is 3. What' 15 the skew? 1, 3, 3, 9. Show your work. This' 15 simply a list of _numlgers.r_11his is not a sample. luv-immense” M _: i i ‘ \KDD =.\( ‘ d: i H '7' ’3 ”/37 m 3 7 Cié 2% L1,; . . .I I_ ‘f' 7'1. .-—LJ_ “-7 I J i . '- re“ Li ”I ~"l , ran—— \ a am , \$23 ‘5 Li 5 125 33 277 The ﬁrst central moment of a distribution is what? (We are not looking for a formula; rather what does it equal, or what is another name for it, etc. ?) ewZaw was... new '— ' m *“Wew In?" 13 Now matter the shape of the distribution, we know at least what percent falls within two standard deviations from the mean? _L ”.....L.:“ W 22. Li iﬂi : ____ 672- 730/2)” W-m 'm 9 The correlation coefﬁcient 13 a measure mof association for interval and ratio data. What kind of association does it measure the L| 9937512 m m say about the ability-1?“ usmg one variable to predict the value of the other variable? I r0437 «Pf/:21), «Wag-:0!!- Wm M ,. . W a 16— 18. (Three questions~ thirty points) Calculate the correlation coefﬁcient for the following data. I suggest using n- l in the denominator (although it won t affect your answer). 15. a_Y M \$92“ (35131 (ix-296%?) «l I Q 3 20 ”“7 1:) ”ﬂ li v7 W5 7 32 v 1; g6”.,:‘7 is g; a an 3 SM *1! 2,5 1 “is 3'53? “T;new m ~31“ :55. - ' ...
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