The difference over the speed limit drivers went when speed was monitored by a visible police car versus a warning sign. A visible police car led to -5.125 fewer excess miles per hour than the warning sign for eight drivers in each condition. The value of the σM1 _M2 was 1.96112.
a. What is the best point estimate for the difference in excess speed for the next two speeders in each condition?
b. In constructing a confidence interval for the expected difference in speed, what difference score will fall in the center of the interval?
c. We can be 95% confident that the true difference in excess speed will be between which two values?
For Information: Exercise 10 in Module 20 addressed.