In Forming a 95% Confidence Interval for a Population Mean

question 209

True/False

In forming a 95% confidence interval for a population mean from a sample size of 20, the number of degrees of freedom from the t-distribution equals 18.

---

Definitions:

Contrast Effect

A cognitive bias where the difference between two things is exaggerated because they are compared directly to each other.

Perceptual Distortion

A cognitive bias that affects how one perceives reality, often leading to inaccuracies or misinterpretations.

Selective Attention

The process by which one focuses on certain stimuli within the environment while ignoring others, thereby allocating cognitive resources to relevant information.

Halo Effect

a type of cognitive bias where the perception of one positive quality in a person or thing influences the overall perception of that entity as positive.