Statistics

A population of individuals was exposed to lead contamination in drinking water at the concentration of 27 parts per billion (ppb). The following represents a small sample set from the population indicating the level of response to the contaminant rated on a scale from 1–20. Within your response, please explain how you calculated your answer (1 indicating minimal effects and 20 indicating maximum effects to the lead exposure).

Given the data set 9, 12, 7, 15, 8, 9, 10, calculate the following results:

a. mean,
b. mode,
c. median, and
d. standard deviation. 

 
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