PSYC 2360 Lecture Notes - Lecture 8: Statistical Inference, Null Hypothesis, Mean Absolute Difference
19 Jan 2017
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Samples and populations: research findings are based on samples drawn from populations, inferential statistics - allow us to infer what the population is like, based on sample data. Researchers use inferential statistics to determine whether an independent variable had a reliable effect on a dependent variable. Inferential statistics allow us to rule out whether the findings from our experiment might be simply due to chance (error variation). Sampling distribution the distribution of all the possible values of a statistic (e. g. correct guesses, mean: sampling distribution of the mean. Plot the means distribution of sample means. The null hypothesis: assumes observed data do not differ from what would be expected on the basis of chance, symbolized as h0. Coin guessing (10 times), correct guess is . 5. Mean of experimental group equals mean of control group: we want to reject the null hypothesis.
