A school psychologist uses a well-being scale to see if the level of well-being in fourth graders who have been taught positive psychology strategies is higher than that of fourth graders in general at the school. The results of previous testing indicate that fourth graders at the school usually have a score of 5 on the scale, but the variance is unknown. The current sample of 25 fourth graders has a mean well-being score of 6.2 The psychologist tests the null hypothesis that the level of well-being of fourth graders in this sample is not higher than the well-being level for fourth graders in general at the school and obtains a t value of 1.90. Using a .05 level of significance, the psychologist would decide to reject the null hypothesis. reject the research hypothesis. adjust the power. increase the sample size