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A teacher wants to know whether the children in her class are performing significantly better on a standardized math test compared to the national average. The national mean score is μ = 85, the national standard deviation is σ = 5, and the mean score in her class is M = 92.5. Use α = .05. What is the z-statistic in this test?

For the following distribution, what is the highest score?X               f20-24   215-19   510-14   45-9         1

What is indicated by a Pearson correlation of r = +1.00 between X and Y?

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 no main effect for factor B?     B1 B2 A1 16 10 A2 12 ?

In a distribution with positive skew, scores with the highest frequencies are ____.

What is the critical value for a repeated measures ANOVA with n=25, 4 levels for factor A, dfWG = 52, and an alpha level of 0.05?

A population has SS = 100 and s2 = 4.  How many scores are in the population? 

In a distribution with positive skew, scores with the highest frequencies are ____.

In the first stage of a repeated-measures ANOVA, total degrees of freedom is partitioned into:

What is the null hypothesis for a two-tailed repeated-measures t-test?