Identify the Indicated Submatrix $A = \left[ \begin{array} { r r | r } 2 & 6 & 1 \\ - 2 & 0 & - 1 \\ 0 & 3 & - 6 \\ \hline 3 & 6 & 3 \end{array} \right] .$

question 66

Multiple Choice

Identify the indicated submatrix.
- $A = \left[ \begin{array} { r r | r } 2 & 6 & 1 \\ - 2 & 0 & - 1 \\ 0 & 3 & - 6 \\ \hline 3 & 6 & 3 \end{array} \right] .$

• A) \([ 6 ]\)
• B) \(\left[ \begin{array} { l l } 3 & 6 \end{array} \right]\)
• C) \([ - 2 ]\)
• D) \(\left[ \begin{array} { r } 1 \\ - 1 \\ - 6 \end{array} \right]\)

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Definitions:

Confidence Interval

A set of values gathered from sample statistics that is presumed to hold the value of an undetermined population parameter.

Margin Error

An expression of the amount of random sampling error in a survey's results, which describes the range within which the true value lies with a certain level of confidence.

Margin Error

The maximum expected difference between the true population parameter and a sample estimate of that parameter.

Confidence Interval

A range of values, derived from sample statistics, that is likely to contain the value of an unknown population parameter, often expressed in terms of a percentage indicating the degree of confidence.