Question

IW Ch10-11 Supplement Tuyen Nguyen Microscft Word (Product Activetion ailed InsertPage Layout References MailingsReviw Virw ぬCut Times New Rom» | 12 A A- Aa . - PasteCopy Replace 卫1u.alsi X, x' A..? av.. 스 T Nomal No Spaci Heeding 1 Hesding 2 Subtrtie Subtle EmEmphas Intense E styles, I d Select Edring Format Painter Styles 1. In this class wc have come across scvcral quantities whosc sign and magnitude can be interpreted separately. What do each of the following mean? (a) A value has a z-score of2 (b) A valuc has a z-score of -2 (c) A 95% confidence interval for μ-μ2 is (-0.15, 0.25) (d) A 95% confidence interval for#1-12 is (0.15, 0.25) (c) A 95% confidence interval for μι-H2 is (-0.25,-0.15) (f) Repeat parts (c) through (e), but now the 95% canfidence interval is for Pi-P2 (g) The slope of theleast-squares regression equation ofy on xis 4.6 (h) The slope of theleast-squares regression equation ofy on x is 4.6 The residual for a given point is 0 87 ) The residual for a given point is-087 (k) In a nultiple linear regression equation predicting y from xi, x2, andx3, the slope corresponding toxis 0.542. のIn a multiple linear regression equation predicting y from x1, X2, and X3, the slope corresponding to x2 is-0.542. Page: 1 ot 6 Words: 40/1,519 100% 523 PM

Answer 1

value has a Z- score of & nf a value has a T score of ' s that the value fs a stancord deviation above the mean Sine t has "4" positive magんtude tb) A value has a z-score of 2 Since t hos ne means that the value is 2 standard devi ations below the meat A 95% We can interprete this as "There is 95 chance that difference of tue populatiei means uU, lies betuucen loer boun. C confidence intr al .,-u2 is Co-Kp40 and upper bound o a1 There tsS chonce thad differene of tr ue population means - es betuee lowerbaund oNS and upper bound