The formula in the image is a coefficient of reliability known as Cronbach's _____.Answer instructionsOmegaCommaGammaThetaAlpha

The answer to your question is "Alpha."

Explanation:

Cronbach's Alpha is a commonly used statistic to measure the internal consistency or reliability of a set of items, such as a questionnaire or a test. It evaluates how closely related a set of items are as a group. A higher value of Cronbach's Alpha (ranging from 0 to 1) indicates better reliability, suggesting that the items measure the same underlying construct effectively.

The formula for Cronbach's Alpha can be expressed as:

$\alpha = \frac{N \cdot \bar{c}}{s^2 + (N - 1) \cdot \bar{c}}$

Where:

• $N$ is the number of items,
• $\bar{c}$ is the average inter-item covariance among the items,
• $s^2$ is the variance of the total score.

In practice, this coefficient is frequently utilized in psychology and the social sciences to assess the reliability of scales and tests. A Cronbach's Alpha value above 0.7 is generally considered acceptable, while values above 0.9 suggest excellent reliability. Therefore, the correct completion of the phrase is "Cronbach's Alpha."