LING 1200 Lecture Notes - Lecture 10: Null Hypothesis, Standard Deviation

• School: University of Manitoba
• Department: Linguistics
• Course: LING 1200
• Professor: Erin L.Wilkinson

Document Summary

Must square root because not original unit. Higher the standard deviation, the greater variability among the scores. The null hypothesis: a statement asserting that the manipulated independent variable will not have an effect of the dependant variable (no relation between the two variables) The alternative hypothesis: a statement asserting that the manipulated independent variable will have an effect on the dependant variable (relation between two variables) less likely. Rarely will an experiment produce no difference between conditions (differences are expected to occur due to chance) Issue is whether the difference is larger enough to warrant rejection of the null. Hypothesis and acceptance on the alternative hypothesis in exchange. Normally distributed: most people cluster around some average value, values that deviate from the average become increasingly improbable. If the null hypothesis were true and the experiment were run an infinite number of times then the difference between conditions would be normally distributed with a mean of zero (symmetrical)