Z-Scores Are Useful Because

question 22

Multiple Choice

Z-scores are useful because

• A) z-scores indicate a person's standing as compared to the group mean
• B) z-scores can be converted to percentiles (assuming a relatively normal distribution)
• C) z-scores are usually positive
• D) both a and b

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Definitions:

Type II Error

Occurs when a statistical test fails to reject a false null hypothesis, also known as a false negative.

Null Hypothesis

A hypothesis that states there is no statistical significance between the two variables in the hypothesis. It posits no effect or no difference as a default stance to be tested against.

Alternative Hypothesis

A statement that contradicts the null hypothesis and proposes that there is a statistically significant relationship between two variables.

Null Hypothesis

A default statement that there is no effect or no difference, often used as a starting assumption in statistical hypothesis testing.