5 Sevenof8500peoplevaccinatedagainstcertaindiseaselaterdevel

5) Sevenof8500peoplevaccinatedagainstcertaindiseaselaterdevelopedthedisease.18of 10,000peoplevaccinatedwithplacebolaterdevelopedthedisease.Testtheclaimthatthe vaccineiseffectiveinloweringtheincidenceofthedisease.Usesignificancelevelof0.02.

UsetheP-valuemethodtotestthegivenhypothesis.Assumethatthesamplesareindependent andthattheyhavebeenrandomlyselected.Identifythenullandalternativehypotheses,test statistic,P-valueandstatethefinalconclusionthataddressestheoriginalclaim.

6) Usethegivensampledatatotesttheclaimthatp1p2Usesignificancelevelof0.10.

Sample1 n1462 x184

Sample2 n2380 x295

Constructtheindicatedconfidenceintervalforthedifferencebetweenpopulationproportions p1p2.Assumethatthesamplesareindependentandthattheyhavebeenrandomlyselected.

7) marketingsurveyinvolvesproductrecognitioninNewYorkandCalifornia.Of558New Yorkerssurveyed,193knewtheproductwhile196outof614Californiansknewtheproduct. Construct99%confidenceintervalforthedifferencebetweenthetwopopulation proportions.

Forproblemand9,Assumethatsimplerandomsamplehasbeenselectedfromnormally distributedpopulationUsetheP-valueMethodtotestthegivenclaim.Identifythenulland alternativehypotheses,teststatistic,P-valueandstatethefinalconclusionthataddressesthe originalclaim.

8) IntheSpapcelabLifeSciencePayload,14maleratsweresenttospace.Upontheirrerurn,thered bloodcellmass(inmilliliters)oftheratswasdetermined.controlgroupof14maleratswasheld underthesameconditionsasthespacerats,andtheirredbloodcellmasswasalsodetermined whenthespaceratswasreturned.Theproject,ledbyDr.PaulX.Callahan,resultedinthedatalisted inthetablebelow.Doestheevidencesupporttheclaimthattheflightanimalshavedifferentredblood cellmassfromofthecontrolanimal?

Flight:

Control:

9.79 7.54

8.55 9.14

8.59

8.64

7.43

7.21

6.87

7.89

6.85

7.00

8.80

9.30

8.03

6.39

8.65

6.99

8.40

9.66

7.62

7.44

8.70

7.33

8.58

9.88

9.94

7.14

b)Use95%confidenceintervaltoconstructconfidenceintrevaltoestimatethedifferencebetween thetwopopulationmeans.doestheconfidenceintervalsupporttheclaim?Explain.

9) testofabstractreasoningisgiventorandomsampleofstudentsbeforeandaftertheycompleteda formallogiccourse.Theresultsaregivenbelow.Atthe0.05significancelevel,testtheclaimthatthe meanscoreisnotaffectedbythecourse.

Before74837588846393849177 After73777077746795838475

Determinewhetherthesamplesareindependentordependent.questions10to14arepoints each)

10) Theeffectivenessofheadachemedicineistestedbymeasuringtheintensityofheadachein patientsbeforeandafterdrugtreatment.Thedataconsistofbeforeandafterintensitiesfor eachpatient.

A) Dependent samples B) Independent samples

11) Theeffectivenessofnewheadachemedicineistestedbymeasuringtheamountoftime beforetheheadacheiscuredforpatientswhousethemedicineandanothergroupofpatients whouseplacebodrug.

A) Dependent samples B) Independent samples

Expressthenullhypothesisandthealternativehypothesisinsymbolicform.Usethecorrect symbol(p,)fortheindicatedparameter.

12) skepticalparanormalresearcherclaimsthattheproportionofAmericansthathaveseena UFO,p,islessthan2ineveryonethousand.

A) H0: p = 0.002 B) H0: p < 0.002 C) H0: p > 0.002 D) H0: p = 0.002 H1: p < 0.002 H1: p 0.002 H1: p 0.002 H1: p > 0.002

Assumethatthedatahasnormaldistributionandthenumberofobservationsisgreaterthan fifty.Findthecriticalvalueusedtotestnullhypothesis.

13) 0.05fortwo-tailedtest.
A) ±1.645 B) ±1.96 C) ±1.764 D) ±2.575

Use the given information to find the P-value. Also, use 0.05significancelevelandstatethe conclusion about the null hypothesis (reject the null hypothesis or fail to reject the null hypothesis).

14) The test statistic in right-tailed test is 0.52.
A) 0.6030; fail to reject the null hypothesis B) 0.3015; reject the null hypothesis

C) 0.3015; fail to reject the null hypothesis

D) 0.0195; reject the null hypothesis

8.59	8.64	7.43	7.21	6.87	7.89
6.85	7.00	8.80	9.30	8.03	6.39

Solution

10) Theeffectivenessofheadachemedicineistestedbymeasuringtheintensityofheadachein patientsbeforeandafterdrugtreatment.Thedataconsistofbeforeandafterintensitiesfor eachpatient.

independent variables

11) Theeffectivenessofnewheadachemedicineistestedbymeasuringtheamountoftime beforetheheadacheiscuredforpatientswhousethemedicineandanothergroupofpatients whouseplacebodrug.

dependent variables

12) skepticalparanormalresearcherclaimsthattheproportionofAmericansthathaveseena UFO,p,islessthan2ineveryonethousand.

B) H0: p < 0.002

H1 p >= 0.002

13)

alpha = 0.05

for two tailed test alpha/2 = 0.025

critcal values using Z normal distribution table

B) ±1.96

Use the given information to find the P-value. Also, use 0.05significancelevelandstatethe conclusion about the null hypothesis (reject the null hypothesis or fail to reject the null hypothesis).

D) 0.0195; reject the null hypothesis

for the other literals

I can gladly help you but you should post it in a new question