Question
1. AIDS-related risk factor. A national study of AIDS risk factors used a random-digit dialing technique to contact study participants. Among the 2673 hetero-sexual adults
1. AIDS-related risk factor. A national study of AIDS risk factors used a random-digit dialing technique to contact study participants. Among the 2673 hetero-sexual adults in the sample, 170 reported two or more sexual partners in the past 12 months.
Use "+4 method"
n-tilda = ?
p-tilda = ?
Partners-tilda = ?
Standard Error = ?
90$ confidence interval
z = 1.645
Po = p-tilda +/- (Z* x SE)
LCL = ?
UCL = ?
2. BRCA1 mutations in familial breast cancer cases. Of 169 women having breast cancer and a familial risk factor, 27 had an inherited BRCA1 mutation. Based on this information, estimate the prevalence of BRCA1 mutation in women with familial breast cancer. Include a 95% confidence interval for the prevalence.
use "+4 method"
n-tilda = ?
p-tilda = ?
BRCA-tilda = ?
Standard Error = ?
95% confidence interval
Z = 1.96
Po = p-tilda+/-(Z* x SE)
LCL = ?
UCL = ?
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