Question

Zika is a serious and highly contagious virus. The Department of Health keeps records of all individuals who have symptoms of and get tested for Zika each year. Use the partially completed relative frequency table below to find the percent of individuals who did not have Zika, given that they tested positive for the virus.

Tests positive Tests negative Total
Has Zika 8.2% 8.9%
Does not have Zika
Total 10.5% 100%
2.3%
2.5%
88.8%
21.9%

Answer 1

To find the percent of individuals who did not have Zika, given that they tested positive for the virus, subtract the percent of individuals who had Zika from 100%. In this case, the percent of individuals who did not have Zika is 91.8%.

Step-by-step explanation:

To find the percent of individuals who did not have Zika, given that they tested positive for the virus, we need to look at the relative frequency table. The table shows that 8.2% of individuals who tested positive for Zika actually had the virus, while 2.3% of individuals who tested positive did not have Zika. Since the table provides information in terms of percentages out of 100, we can subtract the percent of individuals who had Zika from 100% to find the percent of individuals who did not have Zika.

Therefore, the percent of individuals who did not have Zika, given that they tested positive for the virus, can be calculated as:

100% - 8.2% = 91.8%