Psychology 3800F/G Chapter Notes - Chapter 2: Confidence Interval, Central Limit Theorem, Standard Deviation

• School: Western University
• Department: Psychology
• Course: Psychology 3800F/G
• Professor: Ryan Stevenson

Document Summary

If p < . 05 than we conclude the null hypothesis is true. One sample mean: how reasonable is it to assume the sample originated from a population with a given mean. Two sample means: how reasonable is it that two samples came from populations with identical means. Even if the population is not normally distributed, the statistic will be assuming a large sample size: central limit theorem. Contrast the difference between the difference of the two sample means from their population means and divide by the standard error of the difference between the two independent means. The shape of any sampling distribution is given by its density function: equation that describes the shape of the distribution, can be used to determine the area under the curve between any to points. Determining if variances are heterogeneous or homogenous conduct a test of the difference between the variability in the two samples.