The values in the following matrix are treatment means from a two-factor study. One of the means is missing. What value for the missing mean would most likely result in main effect for factor A but not factor B?     B1 B2 A1 12 13 A2 8 ?

What does it mean for a result to be statistically significant?

If the null hypothesis is true, what value is expected on average for the repeated-measures t statistic?

A researcher has changed the alpha value from α = .05 to α = .01 for his study. What impact will this have?

There is a six-point difference between two sample means.  If the two samples have the same variance, then which of the following values for the variance would make the mean difference easiest to see in a graph showing the two distributions?

Calculate the raw score given the following information. Z = 2.5, M = 50, and the standard deviation = 5

The smallest score in a population is X = 5 and the largest score is X = 10.  Based on this information, you can conclude that ____.

A researcher has changed the alpha value from α = .05 to α = .01 for his study. What impact will this have?

Two scores are recorded for a sample of n = 5 participants. Find  ΣX + ΣY (sigma X plus sigma y). . Subject            X         Y            1          3          2            2          3          6            3          8          2            4          1          5            5          0          1

For an ANOVA, what is the expected value for the F-ratio when the null hypothesis is true?