PSYC 2022 Chapter Notes - Chapter 10: Three Steps, Confidence Interval, Variance
21 Mar 2018
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10. 1 introduction to independent measures design: research design that are used to obtain two sets of data can be classified in two general categories: It comes from two completely separate groups or participants. It comes from a same group of participants. The smallest difference occurs when x1 = 50 and x2 = 30. The difference of score for the smallest difference is 20 pts. Hence, the range of variability is 30 pts (x1 - x2 = It combines two sample variances into a single value: for example in equal samples sizes: In this case, the pooled variance is not located halfway between the two sample variances. Instead, pooled value is closer to the variance for larger sample than it is to the smaller one. Step 1: state the hypotheses and select the alpha level: a = 0. 05, h0 = u1 - u2 = 0, h1 = u1 - u2 =/= 0.
