An infectious disease lab has taken samples from several surfaces within an office building. The lab calculates the percentage of the surface area of the sample that is covered in bacteria. In four of the samples, the percentage of bacteria covering the surface was 0.13, 0.19, 0.22, and 0.25. Which gives the best estimate of the percentage of surfaces within the office building that are covered in bacteria?(1 point)

Question

Responses

0.26
0.26

0.79
0.79

3.16
3.16

0.20

Answer 1

To find the best estimate of the percentage of surfaces within the office building that are covered in bacteria, we can calculate the average of the given samples:

1. Add all the percentages together: \[ 0.13 + 0.19 + 0.22 + 0.25 = 0.79 \]

2. Divide by the number of samples (4): \[ \frac{0.79}{4} = 0.1975 \]

Rounding 0.1975 gives approximately 0.20.

Thus, the best estimate of the percentage of surfaces within the office building that are covered in bacteria is 0.20.