An Urban Planning Group Is Interested in Estimating the Difference

Multiple Choice

An urban planning group is interested in estimating the difference in mean household income between two neighbourhoods. They obtain the following 95% confidence interval: (-5693, -4107)
Which of the following is true?

A) This is a pooled t-confidence interval.
B) There is no significant difference in the mean household incomes between the two neighbourhoods.
C) There is a significant difference in the mean household incomes between the two neighbourhoods.
D) This is a paired t-confidence interval and there is no significant difference in the mean household incomes between the two neighbourhoods.
E) This is a paired t-confidence interval and the mean household income of the first neighbourhood is higher than in the second.