In: Math
1. How did you construct the confidence interval (put the formula into words) and Please mention how to find your critical values
2. . And then I need two comparisons/contrasts: compare the 90% and 95% confidence intervals within a group, is one longer than the other? If so, why?
3. Finally, compare the 95% confidence intervals across groups. Is there any overlap in the intervals or is one interval completely greater than the other?
mean: 24025.4 (NY) and 12247.21 (TX)
std. deviation: 16049.05(NY) and 9448.70(TX) respectively
And sample size n=50 for both