95% confidence interval with the mean and sd of these differences t* critical value needed for the confidence interval. confidence as (lower limit,

95% confidence interval with the mean and sd of these differences

t* critical value needed for the confidence interval.  confidence as (lower limit, upper limit).

confidence interval capture 0?  what this implies in the context

I have to imagine I am using a hypothesis test to determine if a significant difference exists in mean stopping distance between the two types of pavements (the hypotheses would be H0: μD = 0 vs Ha: μD ≠ 0). I have to use the confidence interval to determine What decision and conclusion can be made in this case.