TABLE E1.15
Tuberculosis
X-ray No Yes Total
Negative 1739 8 1747
Positive 51 22 73
Total 1790 30 18201.16 Sera from a T-lymphotropic virus type (HTLV-I) risk group (prostitute
women) were tested with two commercial ‘‘research’’ enzyme-linked
immunoabsorbent assays (EIA) for HTLV-I antibodies. These results
were compared with a gold standard, and outcomes are shown in Table
E1.16. Calculate and compare the sensitivity and specificity of these two
EIAs.
TABLE E1.16
Dupont’s EIA Cellular Product’s EIA
True Positive Negative Positive Negative
Positive 15 1 16 0
Negative 2 164 7 1791.17 Table E1.17 provides the number of deaths for several leading causes
among Minnesota residents for the year 1991.
TABLE E1.17Cause of Death Number of DeathsRate per 100,000
Population
Heart disease 10,382 294.5
Cancer 8,299?
Cerebrovascular disease 2,830?
Accidents 1,381?
Other causes 11,476?
Total 34,368?(a)Calculate the percent of total deaths from each cause, and display
the results in a pie chart.
(b)From the death rate (per 100,000 population) for heart disease, cal-
culate the population for Minnesota for the year 1991.40 DESCRIPTIVE METHODS FOR CATEGORICAL DATA