12 A random sample of size 16 is taken from a normally distributed population resulted in...
11 ans pls A random sample of size 16 is taken from a normally distributed population resulted in a sample standard deviation, s = 10. If we are testing the null hypothesis Ho : o2 = 122 versus the alternative hypothesis Hq : o2 > 122, [Sampel rawak bersaiz 16 yang diambil dari populasi yang bertaburan normal menghasilkan sisihan piawai sampel, s = 10. Sekiranya kita menguji hipotesis nol Ho : o2 = 122 melawan hipotesis alternatif He : >...
In a random sample of 3,000 non-smckers, 270 suffer from heart disease and, in sample of 800 smokers, 88 suffer from heart disease. At the 0.01 level of significance, test whether the prevalence of heart disease is significantly higher in smokers as compared to non-smokers? [8 markah/marks] (b) Seorang penyelidik ingin membandingkan gaji purata penganalisis kewangan wanita dan lelaki. Seramai 25 orang penganalisis kewangan lelaki dan 16 penganalisis kewangan wanita yang dipilih secara rawak. Gaji purata dan sisihan piawai untuk...