Question

calculate the average dissolved oxygen for each site and input it into the appropriate locations on the data tables! test site 1 sample number average dissolved oxygen (mg/l) 1 8 2 8 3 11 4 8 5 9 6 10 test site 6 sample number average dissolved oxygen (mg/l) 1 2 2 4 3 2 4 4 5 3 6 3 sorry, that is incorrect! try again!

Explanation:

Step1: Recall average formula

The formula for the average (arithmetic - mean) of a set of numbers $x_1,x_2,\cdots,x_n$ is $\bar{x}=\frac{\sum_{i = 1}^{n}x_i}{n}$.

Step2: Calculate average for Test Site 1

For Test Site 1, the data set is $8,8,11,8,9,10$. Here $n = 6$, and $\sum_{i=1}^{6}x_i=8 + 8+11 + 8+9+10=54$. Then the average $\bar{x}_1=\frac{54}{6}=9$.

Step3: Calculate average for Test Site 6

For Test Site 6, the data set is $2,4,2,4,3,3$. Here $n = 6$, and $\sum_{i = 1}^{6}x_i=2 + 4+2+4+3+3=18$. Then the average $\bar{x}_6=\frac{18}{6}=3$.

Answer:

The average dissolved oxygen for Test Site 1 is 9 mg/L and for Test Site 6 is 3 mg/L.