6. Eighty people are tested for lung infection because of a specific dose of a substance Responses were recorded on a scale from 0 to 10 with 0 indicating no

response (minimum) and 10 indicating a high response (maximum) The number of individuals exhibiting a specific response is given in the following table 1: а.Determine the mean and the standard deviation b. Plot a histogram of the number of individuals affected versus the response с.Plot the normal distribution on the histogram of the original data