Essay --

Part I1.How legion(predicate) independent variables are in a 4X6 factorial design? How umpteen conditions are in this design?There are 4 and 6 independent variables, and 24 conditions for this design.2.What is the difference between a carrell call up and the means employ to interpret a principal(prenominal) effect?The main effect is employ to interpret the differences in means over levels of whizz factor collapsed over levels of the other factor (Jackson, 2012). However, the cell mean is used to interpret is used with models that include three-way interactions. In addition, a cell means is used with mixed procedures (Jackson, 2012).3.What is the difference between a exonerate factorial design and an incomplete factorial design?The complete factorial design consists of all combinations of all factor-levels of each factor and it give the axe number all factors and their interactions (Collins, Dziak, & Li, 2009 Jackson, 2012). In addition, the fixed-level designs may be c alculated (Collins, Dziak, & Li, 2009). For example, a two-level factor, a three-level factor, and a four-level factor has 2 x 3 x 4 = 24 runs.The incomplete factorial design some of the cells are on purpose left empty, where participants will not be assigned to those combinations of factors. It is most apt(predicate) to be used in a controlled group (Trochim, 2000 Jackson, 2012). Therefore, the research fag treasure relative treatment comparisons within a single cogitation and be able to determine the effect of different treatment combinations (Trochim, 2000 Jackson, 2012).4. relieve the difference between a two-way ANOVA and a three-way ANOVA?A one-way ANOVA is used when the research wants to evaluate the differences between variables (Kirk, 1995 Jackson, 2012). For example, a study may evaluate the dif... ...her factor (Trochim & Donnelly, 2008).How does a covariate reduce noise?An ANCOVA design is a noise-reducing experimental design can adjusts posttest scores for vari ability on the covariate pretest. Covariates are the variables you adjust for, where the effect is spill to be removed. Any continuous variable can be used as the covariate however, the pretest is usually best (Trochim & Donnelly, 2008). Describe and explain three trade-offs constitute in experiments.Schank and Koehnle (2009) argued that the three trade-offs present in experiments are the inevitable in any decisions including blocking or to standardize conditions in experiments. The interpretation of quaternary tests of a hypothesis is clarified. Experiments with large samples raise the possibility of small, but statistically significant, biases even after randomization of treatments (Wiley, 2009).