Exposure to microbial products, especially endotoxin, may have an impact on vulnerability to allergic diseases. the following are data on concentration (eu/mg) in settled dust for one sample of urban homes and another of farm homes.

u: 6.0 5.0 11.0 33.0 4.0 5.0 80.0 18.0 35.0 17.0 23.0
f: 2.0 15.0 12.0 8.0 8.0 7.0 6.0 19.0 3.0 9.8 22.0 9.6 2.0 2.0 0.5
determine the sample mean for each sample.

Sample mean for U=21.5

Sample mean for F=8.4

Step-by-step explanation:

Where xi are the observations in the urban homes sample and n is the number of observations in the urban homes sample

Rounding it to one decimal places

Now for second sample

Where xi are the observations in the farm homes sample and n is the number of observations in the farm homes sample

Rounding it to one decimal places

we don't have enough info to solve this