A Statistics Teacher Wants to See If There Is Any $\begin{array}{ll}&\text { Today } & \text { Five Years Ago } \\\bar {x}&82 & 88 \\\sigma^2&112.5 & 54 \\n&45 & 36\end{array}$

question 25

Multiple Choice

A statistics teacher wants to see if there is any difference in the abilities of students enrolled in statistics today and those enrolled five years ago.A sample of final examination scores from students enrolled today and from students enrolled five years ago was taken.You are given the following information. $\begin{array}{ll}&\text { Today } & \text { Five Years Ago } \\\bar {x}&82 & 88 \\\sigma^2&112.5 & 54 \\n&45 & 36\end{array}$
The standard error of $\bar { x } _ { 1 }$ - $\bar { x } _ { 2 }$ is

• A) 12.9.
• B) 9.3.
• C) 4.
• D) 2.

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Jurisdiction

The official power to make legal decisions and judgments, often within a defined area or subject.

Federal Court

A type of court in the United States that has jurisdiction over cases involving federal laws, interstate matters, and other specific cases as defined in the U.S. Constitution.

Jurisdiction

The official power to make legal decisions and judgments, usually referring to a geographic area or type of law.

Original Jurisdiction

The authority of a court to hear a case when it is first brought to court.