Calculate Mean

Question

A rookie with the Ministry of the Environment also generated a frequency distribution of these mercury concentrations. His distribution was the following (it doesn’t follow the 5-15 rule like yours):

Concentration

Frequency

0 up to 5 mg/l

1

5 up to 10 mg/l

26

10 up to 15 mg/l

3

Sum

30

a) Based on these data, what is the mean mercury concentration for these 30 samples? (Hint: use class interval mid-point and weighted mean analysis)

b) Is this answer the same as that arrived at in response to 2a? Why or why not?

 

Summary

The question belongs to Statistics and it discusses about calculation of mean and analyze the answer.

Total Word Count 76

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