In an investigation of environmental causes of disease data

Reference no: EM13605192

In an investigation of environmental causes of disease, data were collected on the annual mortality rate ( deaths per 100,000) for males in 61 large towns in England. In addition, water hardness was recorded as the calcium concentration ( parts per million or ppm) in the drinking water. The following regression equation was obtained:

Mortality= 1676.36 - 3.226 ( calcium) R-squared= 42.9%

a) Identify and interpret the slope of the line.

b) Calculate the correlation coefficient and use it to interpret the relationship between water hardness and mortality rate

c) In a town with a calcium concentration of 75 parts ppm the calculated residual is 10.6

1. Calculate the predicted mortality rate for this town

2. What is the true mortality rate in this town?

Reference no: EM13605192

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