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 percentage of individuals who tested positive for Zika from 100%.

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 calculate the complement of the percentage of individuals who tested positive for Zika.

The relative frequency table shows that 8.2% of individuals who tested positive for Zika. To find the percent of individuals who did not have Zika, we subtract this percentage from 100%:

Percent of individuals who did not have Zika = 100% - 8.2% = 91.8%