The critical t-scores that form the boundaries of the rejection region for α = 0.05 are ± _ .
In order to calculate the t statistic, you first need to calculate the standard error under the assumption that the null hypothesis is true. In order to calculate the standard error, you first need to calculate the pooled variance. The pooled variance is s2p
p
2
= . The standard error is s(M1 – M2)
(M1 – M2)
= _ .
The t statistic is .
The t statistic _ in the rejection region. Therefore, the null hypothesis is _ . You _ conclude that bully-victims have a different mean anxiety score than bystanders. Thus, it can be said that these two means are _ different from one another.