Use the data of Exercise 19 to calculate a 95% CI for the difference between true averag...

Use the data of Exercise 19 to calculate a 95% CI for the difference between true average stopping distance for cars equipped with system 1 and cars equipped with system 2. Does the interval suggest that precise information about the value of this difference is available?

Reference of Exercise 19

Suppose μ₁ and μ₂ are true mean stopping distances at 50 mph for cars of a certain type equipped with two different types of raking systems. Use the two-sample t test at significance level .01 to test versus for the following data