Question

Question 1 8 marks In a study concerned with the effects of smoking on blood pressure, the smoking status (Yes 1, No-0) and systolic blood pressure (mmHg) were recorded for 500 randomly selected people. The purpose of the following analysis is to wetermine whether the systolic blood pressure of smokers is significantly different from that of non-smokers. The data are available on MyUni in the file BP.csv. (a) Explain briefly why the data should be treated as two independent samples rather than paired. (b) Use MATLAB to perform a two-independent sample t test. State the value of the test statistic, the reference distribution with appropriate degrees of freedom, and the P-value. Do you reject or retain the null hypothesis at the 5% level of significance? Make sure to include the code you used in MATLAB to run the test, along with the output (do NOT include any code used to import/write out data). 3 (c) Determine if the assumptions of the test are met. Include any plots you produce to support your comments, and comment on the validity of the P-value you obtained in Part (b).

appreciate the process in detail and the matlab code

please leave an email address ,I will send it to you

Answer 1

nswer iven , (a) tet me -nst quote an example 0paiedSample and ient Samples se a marufactuing company has manutactuect tuwao dugs nameiy ducg A and 8 the company antrestedto K vohich huabest ng 1) one & byta King enl group e+ nals and administerin -ther th drua A and obsrvinqhe resu t -for a Span of tm hich we cal h wath-out Peiod sthat he efect of druq vantshes comopletety ) Ater the wash- out period the wash-out Perrod -ths same roup vats ass adminichra ted noth drug Band -the effects 24 -the chugs abs Obsasved in this Scenario tha fuuo d admioi &nated the Some go case the all ca collectad on the ráts administe -ina the drccedPained Sample oup of atsthis 04 (f) Anothe r way ? rats and administering druc1A to be of sats and administeving toSecend grou -laking 2. different groups of , first grou

of vats and-lhen 凸bser ving -the effeer of -the drug a",,B aslected or these too qroups s called as tuuo ndependeni amples Tr the above chta Smokes and Soes te anples -than paied, because Smoke rs ale tuwo independent antegories b he dta. for -*hís quesfiornorrovi ded, howevev -the proceduxc for the twe roups are equal ot s do the F test Case 4: : 了-f the P value. 어 F test ts grea re Y -that ouS 4hen we a ceept t uhpothesis (vorian stoltc blood pressure 어-He two a}roups are equal and nedo-thstun independent droplet-t, st using tん fonosinq mat la code output ul have h and alue s h。i -tin's indicates tha ~ejection f -ihe Ye ection of the nu hpothesis

he hutl hypothesis a the . Signt ficancs r-valueュ-f greater-than o.or.then we accept.tk nul hypothesis Case 2. nejest the nu hypothesis olne n. andy asd the 워store blood Pessuye of group A e B h output ut have h and P vals f h:ו ,"ndan tes -thENejection of-tho nulf hypothesis at one ot th , have expla i ned in-the-, prvious 82b diviwon acsumptions ic regardng the vaviana which ty