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 2012 is $\text { P12 }$ and the proportion of students retained in 2013 is $\mathrm { P } 13$ .A study found a 90% confidence interval for $\text { P12 }$ - $\mathrm { P } 13$ is (-0.0398,0.0262) .Give an interpretation of this confidence interval.

• A)We are 90% confident that the proportion of students retained in 2012 is between 3.98% less and 2.62% more than the proportion of students retained in 2013.
• B)We know that 90% of students retained in 2013 is between 3.98% less and 2.62% more than 2012.
• C)We know that 90% of students retained in 2012 is between 3.98% less and 2.62% more than 2013.
• D)We are 90% confident that the proportion of students retained in 2013 is between 3.98% less and 2.62% more than the proportion of students retained in 2012.
• E)We know that 90% of all random samples done on the population will show that the proportion of students retained in 2012 is between 3.98% less and 2.62% more than the proportion of students retained in 2013.

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Definitions:

Market Value

The current price at which an asset or service can be bought or sold in the open market.

Assessed Valuation

The dollar value assigned to a property by a public tax assessor for the purposes of taxation.

Tax Rate

The percentage at which an individual or corporation is taxed.

Valuation Rate

A rate used to determine the current or projected worth of an asset or a company.