Which of the Formulas Below Would Be Used to Determine $$n = \frac { \sigma ^ { 2 } z ^ { 2 } } { D ^ { 2 } }$$

question 4

Multiple Choice

Which of the formulas below would be used to determine the sample size using the formula for the standard error of the mean?

• A) \[n = \frac { \sigma ^ { 2 } z ^ { 2 } } { D ^ { 2 } }\]
• B) \[n = \frac { \pi ( 1 - \pi ) z ^ { 2 } } { D ^ { 2 } }\]
• C) \[\sigma X = D / z\]
• D) A and C are correct.

---

Definitions:

Autism Spectrum Disorder

Varieties of neurodevelopmental disorders marked by problems in social abilities, repetitive actions, and both verbal and nonverbal communication challenges.

Working Memory

A cognitive system responsible for temporarily holding information available for processing, important for reasoning and the guidance of decision-making and behavior.

Mathematics

The abstract science of number, quantity, and space, either as abstract concepts (pure mathematics) or as applied to other disciplines such as physics and engineering (applied mathematics).

Twin Studies

Research studies that compare the similarities and differences between monozygotic (identical) and dizygotic (fraternal) twins to understand the influence of genetic vs. environmental factors on various traits and disorders.