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?

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

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

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

The sign of a z-score indicates _________.

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 ?

The following table shows the results of a between-subjects ANOVA. Based on this table, what is the value for eta squared (η2), the percentage of variance accounted for?      Source                         SS        df        MS            Between Groups   36          2          8                Within Groups        64        21         4                Total                            100        23       

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

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

The sign of a z-score indicates _________.