Show That $\left( - \frac { 2 \sqrt { 2 } } { 3 } , - \frac { 1 } { 3 } \right)$

question 10

Essay

Show that $\left( - \frac { 2 \sqrt { 2 } } { 3 } , - \frac { 1 } { 3 } \right)$ is on the unit circle.

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Definitions:

Estimated σ

Approximation of the standard deviation (σ), a measure of the dispersion or variation of a distribution.

Normal Probability Distribution

A bell-shaped probability distribution, also known as Gaussian distribution, that is fully defined by its mean and standard deviation.

Sampling Distribution

The probability distribution of a given statistic based on a random sample, used to make inferences about the population.

Np

A term related to statistics, often referring to the expected number of successes in a Binomial distribution.