Evaluate the Expression $$\left( - \frac { 64 } { 81 } \right) ^ { - 1 / 2 }$$

question 454

Multiple Choice

Evaluate the expression.
- $$\left( - \frac { 64 } { 81 } \right) ^ { - 1 / 2 }$$

• A) \(\frac { 8 } { 9 }\)
• B) not a real number
• C) \(- \frac { 9 } { 8 }\)
• D) \(\frac { 32 } { 81 }\)

---

Definitions:

Population Variance

The average of the squared differences between each data point in a population and the mean of the population.

Hypotheses

Statements made for the purpose of testing with statistical analysis, to see if there is enough evidence to support a particular belief or theory.

Significance Level

A threshold in hypothesis testing that determines the probability of rejecting a true null hypothesis, denoted as alpha (α).

Population Variance

The measure of the dispersion of all values in a population from the population mean.