When comparing the mean annual incomes for executives with a High School education or less and Undergraduate Degree, the 95% confidence interval shows an interval of 11.7 to 42.7 for the difference. This result indicates that:
A) There is no significant difference between the two incomes.
B) The interval contains a difference of zero.
C) Executives with and Undergraduate Degree earn significantly more than executives with a High School education or less.
D) Executives with and Undergraduate Degree earn significantly less than executives with a High School education or less.

Question

Quizplus · Accepted Answer

The confidence interval does not contain zero and is entirely positive, indicating that executives with an Undergraduate Degree earn significantly more than those with a High School education or less.

When Comparing the Mean Annual Incomes for Executives with a High