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UNIVERSITI SAINS MALAYSIAPEPERIKSAAN KURSUS SEMASA CUTI PANJANGACADEMIC SESSION 2OO7l2008JUNE 2OO8JIB 213 _ BIOSTATISTICSIBIOSTATISTIKJDuration: 3 hours[Masa : 3 jamJPlease ensure that this examination paper contains SIX printed pages before you beginthe examination.Ensure formula and tables are enclosed with the question paper.Answer FM questions. You may answer either in Bahasa Malaysia or in English.All answers must be written in the answer booklet provided.Each question is worth 20 marks and the marks for each sub question is given at the endof that question.Sila pastikan bahawa kertas peperiksaan ini mengandungi ENAM muka surat yangbercetak sebelum anda memulakan peperiksaan ini.Sila pastiknnformula dan rumus disertakan bersama kertas soalan.Jawab LIMA soalan. Anda dibenarkan menjawab soalan sama ada dalam BahasaMalaysia atau Bahasa Inggeris.Setiap jawapan mesti dijawab di dalam buku jawapan yang disediakan.Setiap soalan bernilai 20 markah dan markah subsoalan diperlihatkan di penghujungsubsoalan itu.aturB 21311. Diastolic blood pressure X in hypertensive women is estimated at about 180 mmHg with a standard deviation of 16 mm Hg and is normally distributed.Tekanan darah diastolik X, wanita hipertensif dianggarkan pada 180 mm Hg,dengan sisihan piawai 16 mm Hg dan taburan adalah normal.(a) Find the probability whenCari kebarangkalian apabila(r) P(x<90)(ii) P(x>e0)(iii) P(96 < x < 104)(15 marks)(b) Find thevaluex sothat P(X < x) : 0.95Carinilai x supayaP(X 3x) :9.95(5 marks)2. The mean blood cholesterol concentration of a large population of adult males(50 - 60 years old) is 200 mgdl with a standard deviation of 20 mg/dl. Assumethat blood cholesterol measurement is normally distributed.Min kepekatan kolestrol darah bagi populasi lelaki dewasa (50 - 60 tahun)adalah 200 mg/dl dengan sisihan piawai 20 mg/dl. Andaiknn ulatran kolestroldarah bertaburan normal,(i) What is the probability that randomly selected individuals from this agegroup will have a blood cholesterol level below 250m{dl?Apakah kebarangknlian individu dipilih secara rawak daripada lrumpulanumur ini akan mempunyai paras kolestrol di bawah 250 mg/dl?(5 marks)(ii) What is the probability that randomly selected individuals from this goupwill have a blood cholesterol level above 225 mf,dl?Apakah kebarangkalian individu yang dipilih secara rawak daripadalatmpulan ini akan mempunyai paras kolestrol di atas 225 mg/dl?(5 marks)-2-...3/-aJ.-3- [JrB 213](iii) If a group of 25 men who are strict vegetarians has a mean bloodcholesterol level of 188 mg/dl, would you say that these vegetarians havesignificantly lower blood cholesterol level? Explain.Jika lcumpulan vegetarian terdiri daripada 25 orang lelaki dewasamempunyai min paras kolestrol darah 188 mg/dl, bolehkah anda membuatkesimpulan bahawa latmpulan vegetarian ini mempunyai paras kolestroldarah yang rendah? Terangknn.(10 marks)A study on the effects of exercise on the menstrual cycle for 10 female swirnmersprovides the following ages (in years) of menarche (beginning of menstruation).The swimmers began training at least 1 year prior to menarche :Kajian kesan senaman ke atas kitaran haid terhadap sepuluh orang perenangwanita menghasilkan umur (tahun) permulaan haid yang berilan. Semuaperenang telah memulakan latihan renang selatrang-latrangnya setahun sebelumbaligh.13.6 t3.9 14.0 t4.2 t4.9 15.0 15.0 15.1 15.4 1,6.4(i) Calculate the mean and standard deviation for this data. Construct the95% confidence interval for the mean above.Cari nilai min dan sisihan piawai bagi data ini. Bina selang keyakinan95% bagi min di atas.(10 marks)(iD Is the sample mean signifrcantly higher than the overall population meanfor non swimmers which is 12.5 years? Use the 95o/o confidence intervalto provide your rationale.Adakah min sampel ini lebih besar secara signifikan daripada minkeseluruhan populasi bukan perenang iaitu 12.5 tahun? Gunakan selangkeyakinan 9596 untuk menyokong alasan anda.(10 marks)...4t--4- urB 21314. The height and arm span of 10 adult males were measured (in cm). Is there acorrelation between these two measurements?Ketinggian dan panjang depa lengan I0 orang lelaki dewasa diulatr (cm).Adaknh terdapat korelasi antara kedua-dua ularan tersebut?Height (cm) Arm Span (cm)171195180182190175171178r92202173t93188185186178r82182198202(a) Generate a scatter plot of this data.Lakarkan gambar rajah rawakmenggunaknn data di atas.(5 marks)O) Calculate linear correlation value r for this data. Explain.Hitung nilai korelasi r untuk data ini. Terangl<an.(15 marks)...5/-5.-5- lJrB 2131Six garter snakes, Thamnophis radix, were observed during the presentation ofsolutions containing fish mucus, worTn mucus and distilled water (dH2o). Thenumber of tongue flicks during a 5 minute interval of exposure was recorded.The solutions were given to each snake in random order. Data recorded is asfollows :Pemerhatian dilalatkan ke atas 6 ekar ular Thamnophis radix. terhadaprangsangan ke atas j jenis larutan iaitu, mulan ikan, mulus cacing dan air suling(dHzO) pada setiap ular secara railak. Bilangan jeliran lidah oleh ular terhadaplarutan dicerap selama 5 minit. Setiap larutan didedahkan kepada ular secararqwak. Data direkod adalah seperti berilafi :\utu'Snake -yNumber of tongue flicksFish mucus Worm mucus dH2oI2aJ456139t7l01311l81912l6t7l48t210l1t2I2Test if there are any significant differences in the number of tongue flicks amongthe snakes towards the different solutions at90Yo level of confidence (a = 0.10)Uji sama ada terdapat perbezaantersebut terhadap larutan yang(a : 0.10).bilangan jeliran lidah di antara ular-ularberlainan pada aras keertian 90%(20 marks)...6/-6.-6- prB 2l3JA study was conducted in Pulau Redang, to examine the distribution of animalsassociated with different species of coral. Three species of coral, Pocilloporaeydouxi, Acropora sp., Acropora aspera were selected and sampled. The numberof snails of species A and B associated with each coral species were recorded. Isthe distribution of the two snail species the same for all three coral species? Usethe data below to test the hypothesis at o : 0.05 level. Clearly state thehypotheses and interpret the results by using Chi Square test.Satu penyelidikan telah dijalankan ke atas batu karang di pulau Redang.Taburan haiwan berhubung dengan batu karang yang berlainan dikaji. riiospgsies batu larang Pocillopora eydowi. Acropora sp.. Acropora aspera dipilihsebagai sampel. Bilangan siput dari spesies A dan spesies B yang berada di batulrarang tersebut direlad. Adakah taburan siput dari kzdua-dua spesies sama bagisetiap batu karang? Gunaknn data di bawah untuk menguji hipotesis pada arislreertian a : 0.05. Nyatakon dengan jelas hipotesis dan kesimpulan kajiandengan menggunakan ujian Chi Square(20 marks)- oooOooo -\oralSnails \Number of AssociationsTotalPocillopora eydouxi Acropora sp. Acropora asperaSpecies ASpecies B6722ll4I2229Total l3 23 l5 5l

JIB 213 - BIOSTATISTICS JUN 08.pdf

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JIB 213 - BIOSTATISTICS JUN 08.pdf

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