PSYC 2130 Lecture Notes - Lecture 11: Statistical Inference, Null Hypothesis, Type I And Type Ii Errors

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5 chapters on syllabus not chapter 10. Dr. x is interested in whether or not there are differences between 10 yr olds and 5 year olds described test , way test is administered. Lecture 11 outline: the logic of inferential statistics. Chance factors that are inherent in forming samples will always affect your results. Your results therefore must be interpreted in that light. The purpose of inferential statistics: looking for accurate reading to illuminate factors of chance(sampling variation). Will such a difference change with the retraction of sampling variation. Allows us to make statements about true differences between groups. Always remember: a significant difference can be obtained in many ways: four factors which can produce significant differences between groups. Difference: chance more clever boys in group 1 and not group 2, operation of the independent variable training is actually effective, error scoring error, calculation error, fraud pressure on graduate students to publish something.

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