Recently, the annual number of driver deaths per 100,000 for the selected age groups was as follows:

a. For each age group, pick the midpoint of the interval for the x value. (For the 75+ group, use 80.)

b. 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.

c. Calculate the least squares (best-fit) line. Put the equation in the form of: y = a + bx

d. Find the correlation coefficient. Is it significant? e. Predict the number of deaths for ages 40 and 60.

f. Based on the given data, is there a linear relationship between age of a driver and driver fatality rate?

g. What is the slope of the least squares (best-fit) line? Interpret the slope.

Transcribed Image Text:

Age Number of Driver Deaths per 100,000 17.5 38 22 36 29.5 24 44.5 20 64.5 18 80 28 Table 12.19 Age Number of Driver Deaths per 100,000 17.5 38 22 36 29.5 24 44.5 20 64.5 18 80 28 Table 12.19

Answer rating: 100% (QA)

a The data is shown below b While creating scatterplot consider Ages as an independent variable on X axis and consider Number of driver deaths per 100000 as a dependent variable on Y axis The scatterp... View the full answer