Question:  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.

I am not looking for some help on this paper, but my paper must be at least three hundred word in length, What I am looking for from the tutors is something that will help me get well on my way in writing my own paper.