Question

Please explain. I followed steps from previously posted problems and I don’t know where I went wrong.

ASS 9 9E.020 My Notes Ask Your Teacher Suppose μί and μ2 are true mean stopping distances at 50 mph for cars of a certain type equipped with two different types of braking systems. The data foto es: x-1 142, s1ー5.07, n _ 9, y一129. 2, and s2-5.37. Calculate a 95% Cl for the difference between true avenge stopping distances for cars eguipped with tystem and cars equipped with system 2. (Round your answers to two decimal places) 9.18 X,20.82 Does the interval suggest that precise information about the value of this difference is available? O Because the interval is so narrow, it appears that precise information is available. O Because the interval is so wide, it appears that precise information is available O Because the interval is so narrow, it appears that precise information is not available. O Because the interval is so wide, it appears that precise information is not available You may need to use the appropriate table in the Appendix of Tablés to answer this question. Need Help? Submit Answer Save Progress Practice Another Version o -13 points DevoreStat9 9.E.036 My Notes Ask Your Teacher Consider the accompanying data on breaking load (xg/25 mm width) for various fabrics in both an unabraded condition and an abraded condition. Use the paired t test to test Ho: μο-0 versus Ha: μο > 0 at significance level 0.0. (UseHo-Au-μΑ.)

Answer 1