Assume That Z Scores Are Normally Distributed with a Mean

question 30

Multiple Choice

Assume that z scores are normally distributed with a mean of 0 and a standard deviation of 1 . If $P ( - a < z < a ) = 0.4314$ find a .

• A) -0.18
• B) 0.3328
• C) 0.57
• D) 1.49

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Definitions:

F Distribution

A statistical distribution used in analysis of variance, displaying possible values a statistic might have for complex comparisons.

Test Statistic

A uniform measure utilized in statistical hypothesis testing to decide on the rejection of the null hypothesis.

Chi-Square Values

A measure in statistics that compares observed results with expected outcomes, used to determine if there are significant differences between groups.

Confidence Interval

A spectrum of numbers, generated from analyzing sample data, expected to cover the value of a not yet identified population trait.