Question

Data in the following table describes the statistics for a community-based screening simulation study. Disease status Present Absent Total Screening results Positive 80 120 200 Negative 20 780 800 Total 100 900 1,000 What is the expected number of patients that will not have disease (absent) and with a negative screen result?

Answer 1

The expected number of patients that will not have the disease and test negative is 702.

Step-by-step explanation:

To calculate the expected number of patients that will not have the disease and test negative, we need to multiply the probability of being absent (900/1000) with the probability of testing negative given an absent disease status (780/900).

Expected Number = (900/1000) x (780/900) = 702

Therefore, the expected number of patients that will not have the disease and test negative is 702.