A University Is Studying the Proportion of Students Retained in Various

question 14

Multiple Choice

A university is studying the proportion of students retained in various years.Suppose the proportion of students retained in 2009 is
And the proportion of students retained in 2010 is
.A study found a 90% confidence interval for
-
Is (-0.0398,0.0262) .Give an interpretation of this confidence interval.

• A)We are 90% confident that the proportion of students retained in 2009 is between 3.98% less and 2.62% more than the proportion of students retained in 2010.
• B)We know that 90% of students retained in 2010 between 3.98% less and 2.62% more than 2009.
• C)We know that 90% of students retained in 2009 between 3.98% less and 2.62% more than 2010.
• D)We are 90% confident that the proportion of students retained in 2010 is between 3.98% less and 2.62% more than the proportion of students retained in 2009.
• E)We know that 90% of all random samples done on the population will show that the proportion of students retained in 2009 is between 3.98% less and 2.62% more than the proportion of students retained in 2010.