A 95% confidence interval for the mean difference (twin 1 – twin 2) in height is (–0.823, 0.573). based on the confidence interval, is it reasonable to claim there is no difference in the heights of twins?
a. no, 0 is contained in the 95% confidence interval.
b. yes, 0 is contained in the 95% confidence interval.
c. no, the 95% confidence interval contains positive numbers.
d. yes, the 95% confidence interval contains negative numbers.