PSYC 2360 Chapter Notes - Chapter 8: Statistical Inference, Null Hypothesis, Statistical Hypothesis Testing
24 Jan 2017
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Document Summary
Correlational research and experimental research are designed to investigate relationships among one or more variables. Researchers use a standardized method to test whether the data they collect can be interpreted as providing support for their research hypotheses. All data contain random error mind coin flip: she has to say whether its head or tail were the results by chance (due to guessing, which causes random error) It is impossible to ever know for sure whether the observed data were caused by random error. Significance tests on the observed data may be either statistically significant (p < . 05) or statistically non- significant (p > . 05: determine whether the null hypothesis should be accepted or rejected. Significant results (p < . 05) reject null hypothesis. Non-significant results (p > . 05) fail to reject null hypothesis. These procedures involve the use of probability and statistical analysis to draw inferences on the basis of observed data.
