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Card 3 / 7:
Recently, the annual number of driver deaths per 100,000 for the selected age groups was as follows:
For each age group, pick the midpoint of the interval for the x value. (For the 75+ group, use 80.)Using “ages” as the independent variable and “Number of driver deaths per 100,000” as the dependent variable, make a scatter plot of the data.Calculate the least squares (best–fit) line. Put the equation in the form of: ŷ = a + bxFind the correlation coefficient. Is it significant?Predict the number of deaths for ages 40 and 60.Based on the given data, is there a linear relationship between age of a driver and driver fatality rate?What is the slope of the least squares (best-fit) line? Interpret the slope.
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