{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

1 Scientific Methods and Statistics

# 1 Scientific Methods and Statistics - Scientific Method and...

This preview shows pages 1–5. Sign up to view the full content.

Scientific Method and Statistics

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Scientific Method Observation: Collect and organize information Hypothesis: Explanation(s) must be testable Experimentation: (a) control vs. experimental variable Control: a variable that remains unchanged; its held constant in order to verify or measure the behavior of the variables against it Experimental: this is a factor or variable that is deliberately manipulated or changed (depend’t vs. independ’t) ( b) replication of experiment (c) statistical evaluation Reevaluation Conclusion ------?-------> theory
Statistical Evaluation and the Chi Square Analysis (X 2 ) Null hypothesis = assumes no real difference between measured (i.e., observed) and expected values, therefore How good is the “fit” between these values If the fit is imperfect, how much deviation is allowed Chi Square Analysis = evaluation of deviation and sample size Value used to evaluate deviation and expectation due to chance X 2 = total of (observed - expected) 2 expected

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Statistical Evaluations Null Hypothesis: Assumption that data will fit into a given pattern or ratio Should be no difference between observed values (ratios) and expected values.
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}