Understand What Is Meant by Equal Matrices
Find Values for the Variables

question 125

Multiple Choice

Understand What is Meant by Equal Matrices
Find values for the variables so that the matrices are equal.
- $$\left[ \begin{array} { r r } x + 3 & y + 4 \\7 & 6\end{array} \right] = \left[ \begin{array} { r r } 5 & - 4 \\7 & z\end{array} \right]$$

• A) \(x = 2 ; y = - 8 ; z = 6\)
• B) \(x = - 2 ; y = 8 ; z = - 6\)
• C) \(x = 5 ; y = - 4 ; z = 6\)
• D) \(x = 2 ; y = 6 ; z = 5\)

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Definitions:

Sample Variances

A measure of dispersion calculated from a sample of a population, representing the average of the squared deviations from the sample mean.

Population Variances

Population variances measure the dispersion of all data points in a population around the population mean, reflecting the overall variability within that population.

Significance Level

A threshold of probability set before conducting a hypothesis test, below which the null hypothesis is rejected, symbolized as alpha (α).

Standard Deviation

Standard deviation is a statistical measure that quantifies the variation or dispersion of a set of data points or values around their mean.