Question

RARATCHATA found 500 ant amokars to volunteer for A study in which AACH WAR Andy A had to an ofitran traalrem UDA Group 1 recated an electric algata which mach carriga contained 72 mg of nicotina Group 2 racaved an Ad that are 5.4 mg af nicotine, and Group 9 received an e-ciguat contained no ricoline. The subjecte did no n which group they were assigned. During the course of the interieron subjecte cropped out of the study. At the end of the study 70 subjects remained in Group 1.71 in Group 2, and 54 in Group 3. Results 98 to whether the uubject yuil smuking entirely are valable below. Complete paris la rough Cick here to view the rest of the study Cick here to Mew the table of crncal values of the chi square distribution. (a) What type of experimental design was used in this study? O A Amalched-asis design with two levels of strent B. A completely randomized design with three levels of treatment OC. THE S ancaservational souity, not a designed experiment. OD. A completely randomized design with two levels of treatment (1) Researchers wanted to know whether electronic cigarettes may be used to hala indMiduals abstain from ticarette smoking What is the reaperse var she? Is it cua lative or quantitative? The response variable quit or not cuit is quitative. (c) To what population do the results of a study apply? i Study Pesults O O Fomer smokers O c.cig Smokers Smokers in the study Ourrent smokers (d) Slate the nulla alleative Popotheses Group 1 Group 2 Group 3 Did Not Quit 59 62 59 Quit Print Dane A. Hy: P. = PEP.: H: At least one of the proportions is different from the others. OB. Hy Quilling and group are incependent Hy Quilling and group are depender OC. Hy: 0, EE, and Oy - 52 and 0,=5 H:0,-E, CO2-Ey or 0,E OD. Hy: P.-P2P (c) Dacs the evidence suggesteces are cffective in helping individuais abstain from cigarette smoking? Use a=001. Compute the value of the chacun test statistie x= Round sa tao dodal places as needed. Identity the vilical value Click to select your answensi.

Answer 1

Expected Values Column 1 Column 2 Column 3 Total Row 1 64x 180 = 56.195 180 70%180 = 61.463 70x25 = 8.537 71x160 = 62.341 71035 = 8.659 Row 2 64x25 = 7.805 25 Total 70 71 64 205

Based on the observed and expected values, the squared distances can be computed according to the following formula: (O-E)^2/E. The table with squared distances is shown below:

Squared Distances Column 1 Column 2 Column 3 Row 1 (59-61.463) 61.463 = 0.099 (62-62.341) = 0.002 62.341 (59-56.195) 56.195 - = 0.14 (11-8.537) Row 2 (9-8.659) (5-7.805) 8.5370 711 8.659 = 0.013 7.805 = 1.008

x2 = (Oij - Eij)? Vijij Ej = 0.099 +0.711 +0.002 +0.013 +0.14 +1.008 = 1.973

Based on the information provided, the significance level is \alpha = 0.05α=0.05 , the number of degrees of freedom isdf=(2−1)×(3−1)=2, so then the rejection region for this test is R={χ2:χ2>5.991}.

táto = 1.97

Xéri = 5.991

The test statistic is less than critical value therefore there is NOT sufficient evidence .

f) OPTION B

GROTEDT 54 DID NOT QUIT QUIT GROUP 1 GROUP 2 GROUP 3

STAY CONSTANT

MOST SMOKERS DO NOT WANT TO QUIT

G] THERE IS NOT SUFFICIENT EVIDENCE TO SHOW THAT MOST SUBJECT WANT TO QUIT.