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@ﬂlﬁﬁmlﬁme: 1af1pt Tﬁtﬁcnre: BI.?%[B.1?uf1ﬂ pts] .5." Which of the following vahres could not represent a correlation coefﬁcient? Choose the correct answer below. 4:. oaaﬂoaoaoaoaoaoaoﬂoﬂ .1»
® ﬂuﬁtinn SoulE: o.5 of 1 pt
Determine whether the scatter diagram imiicates that a
linear relation may exist between the two variables. If
the relation is linear= determine whether it indicates a
positive or negative association between the variables.
Answer both questions below. Do the two variables have a linear r—elationship? [ixi. Thedatapointsdonothavealinear [QFEL Thedatapointsdonothavealinear relationship becausethey donot lie relationship because theyliemainly' rna
mainlyinastraightline. straightline (2.“: Thedatapointshavealinear [2.10 Thedatapointshavealinear relationship becausethey liemainlyina relationship because theydonotlie
straightline mainlyinastraightline. Ifthe relationship 1s linear do the variables have a positive or negative association? [2.1g Themiableshaveapositiveassociation
[2.13 Themiableshaveanegativeassociation L—aﬂ‘ﬂ None ofthe above Question is complete. —. Iﬂﬂﬂﬂ III. ”99:19:20 9 e o e are" @Qrﬁﬁnnsmre: 1 of 1 pt 11515mm: 313% [3.1? of 10 p15} .5.” Identify the elutplarlaturj.r variable and the reepnnse variable. A farmer wants tn detemJine ifthe temperature received by similar craps can he used to predict
the harvest of the crop. The ellrpla1at+nnr3r variable is the warm Therespnnsevariahleisthe Wafﬂleemp _ roaeﬂeaoaeaeaoaoaoeoﬂr ©W5cnre: 1nf1 pt TEtSDnre: 513% {5.1? of 1o [:13] g." For the following data {a} display the data in a scatter plot_. {b} calculate the correlation
coefﬁcient r, and {c} make a conclusion about the type of correlation. The ages {in years} ot'6 children and the number ofwords in their vocabulary —nn ——— (a) Choose the correct scatter plot below. a
«I {b} The correlation coefﬁcient r is .969. {Round to three decimal places as needed.) (c) Which of the following best describes the type of correlation that exists between age and
vocabulary size? [H Hifl'r. Weak positive linear correlation [H HJB. Weak negative linear correlation
[:1C.Nﬁ linear correlation y D. Strong positive linear correlation [ 1E. Strong negative linear correlation Question is com plete. —. sfﬁédemeowﬁﬁr @Wm: 1 of 1 pt TILst: EmuE: 151355 {3.1? of in p13] The weights {inpnmldsjl nfﬁ 1mehicles anithe vaIiability nftheir braking distames (infeet)
when stuppingnnadry sinface are shnwninthetable. Banyan cnmhlde that theteisa
signiﬁcanthneaicnnelahnnbetweenvehxﬂeweaght animmbﬂﬁymhrakmgﬂstame 011:1de
slrface?Usea.= ﬂnﬂl Can yen conchlde that there is a signiﬁcant lineaI cnIIelatinn? ”VI1. Nu theteisnnt ennughevﬂenceatthel%leveltncnmh1dethattheteisa signiﬁcant
lineazrcnnelatinn. . Yes,the1e1s ennugheviienceatthel‘irﬁleveltncnmhﬂethatthereisasigniﬁcant
lineaIcnIIelatinn. . Nu thereisnnt ennngheviienceatthel‘ﬁsleveltncnmhldethatthereisnnsigtﬂﬁcam
lineaIcnIIelatinn. . Yes,the1e1s ennughenienceatthelﬁéleveltncnmhﬂethatthetemnnsagmﬁcam
lineaIcnIIelatinn. Qu estiun is complete. TE: Score: 31.7% [3.1? of 1:} p15} ' Match the {egreasiun aquaiiun Will the appmpiiate graph. {Nate that {has x 3111 3—3135 31E:
huken.) (L
3: —1_:141+50_3 Chuuse 111:: correct mwer bahw.
cm. " Iiiﬁaﬁﬁﬁﬁﬁ'ﬁ 32333435363735 Questiun is Gumplete. «afﬁdféoeec @mm: {1.33 of 1 pt TILst EmuE: 313% [3.1? of 1o [:13] Find the equation ofthe regressionliue for the given data. Thenconslruct a scatter plot ofthe
data and draw the regression line. {The pair of variables have a signiﬁcant correlation.) Then
use the regression equation to predict the value of y for each of the given x—values, if
meaningful. The table below shows the heights (in feet) and the mrmber of stories of six notable
buildings in a city. (arrvmfeet inﬁrm (c) x = 302 feat (d) x = T29 feet Find the regression equation §= ﬂﬂj'hr + 3.65?
{Simplify your answer. Emmi to three decimal places as needed} 63% Choose the correct graph below.
I? B. Question is complete. 4:. 0° 6F" 9" 0° e” e” or" e” ea" in?"
@mﬁﬁmm: 41.53 of 1 pt Tﬁtﬁume: 313% {5.114 of 1o [:13] Findthe equation ofthe regressionline for the givendata. Then construct a scatter plot ofthe
data and draw the regression line. {Each pair of variables has a signiﬁcant correlation} Then
use the regression equation to predict the value of}.r for each of the given x—values, if
meaningful. The caloric content an'lthe sodium content {in milligrams) for 6 beefhot dogs are
shown in the table below. mmIm (memories momma
(43:14: 4445 (4x41441045 Find the regression equation §= 1.521: + 44.49
IiSirjnplii'g.r your answer. Ronni to three decimal places as needed} Choose the correct graph below. {1 Question is complete. {a} Predict the value ﬁfj" for x = 495'. Choose the correct answer below. [:Jﬁ. SCI [g s. 45
(3!: c. 3? [:JD. not meaningful (h) Predict the value of v for x = 646. Choose the correct answer helow. (c) Predict the value of v for s; = 3012. Choose the correct answer helow.
iiiA. 54 {:1 B. St} C: IZ. 45 :5!“ D. not meaningﬁJ] (d) Predict the value of yr for x = T29. Choose the correct answer below.
{in 3? r!“ 3. 5G {:1 E. 54 {:3 D. not meaﬁngﬁll a E a Hoﬂeeﬂwﬂ {0990913 @Wm: {1.53 of 1 pt TEtSmIE: 31.1% {5.1? of 14) p13] .5 ' Find the equation ofthe regression line for the givendata. Thenconslruct a scatter plot ofthe
data arsi draw the regression line. (Each pair of 1variables has a signiﬁcant correlation} Then
use the regression equation to predict the 1.ralue of}.r for each ofthe given x—values, if
meaningful. The caloric content and the sodium content {in milligrams} for 6 beefhot dogs are
shown in the table below. mmIm (anﬂmmes mchamries
<4x=144445 (spasms Find the regression equation a
§= 2.521: + 44.49 H
{Simplify your answer. Ronni to three decimal places as needed) Choose the correct graph below. (.414. :jjj: s. :jjj: e :jjj: o. (a) Predict the value ﬂfj" for a = 1310. Choose the correct answer below. {34. 391430
.3; s. 513.900
.53! E. 493.214) {:1 D. not meaningful (h) Predict the value of v for x = 100. Choose the correct answer helow.
{hf“a. 593.900 {:2 B. 39?.43'0 {gr 0. 290.590 :j:j: D. not meatﬁngﬁll {c} Protect the value o1 v tor x = mu. unoose the correct answer below.
{330. 493.2?(1 {:1 B. 296.590 .33! 0. 399.430 {:1 D. not meaxdngﬁll (d) Predict the value of].r for x = 2113'. Choose the correct answer below. {:30 490.270
c3339. 593.900 ...
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 Spring '09
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 Statistics

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