QUESTION 4 1. In a small trial, researchers studied whether the effect of an inservice about practices around germ control were effective in nurses' knowledge of germ transmission and techniques for mitigating germ transmission. The scores of the nurses on a pre-test and a post-test are shown below. Nurse O'HITIUOUJZP QUESTION 5 Low 2.6 2.4 2.3 2.3 2.7 2.9 2.7 3.0 3.0 2.2 Pretest -Score 63 89 76 71 90 56 78 Post-test Score 81 90 89 76 90 78 82 If we conduct a ttest on these data or, any test what does it mean to set alpha at 0.05? Conduct a paired ttest on the data and report your interpretation of the output. Stress Level Moderate 2.7 2.7 2.1 2.7 2.9 2.2 2.6 2.4 2.5 2.4 High 2.2 2.3 2.0 2.5 2.3 2.1 1.3 1.9 2.5 2.6 1. The data for the perceived level of stress of 30 employees and each employee's number of absences in a 120-day period are shown. o Write the null and alternate hypotheses for the test you suggest conducting to test for signicance of difference between the three levels of stress. 0 Conduct a two-way ANOVA test on the data in the le. Interpret your ndings. 0 Discuss the two kinds of variance here, and indicate how they are compared to conclude a signicant difference