(Solved): The null hypothesis is often from a benchmark or historical value. chosen after looking at the samp ...

The null hypothesis is often from a benchmark or historical value. chosen after looking at the sample data. what the researcher is trying to prove. dependent on the level of significance. Question 5 (10 points) At \( \alpha=.05 \), the critical value to test the hypotheses \( H_{0}: \pi \geq .40, H_{1}: \pi<.40 \) would be \[ \begin{array}{l} -1.645 \\ -1.960 \\ -2.326 \end{array} \] impossible to determine without more information. Management of Melodic Kortholt Company compared absenteeism rates in two plants on the third Monday in November. Of Plant A's 800 employees, 120 were absent. Of Plant Bs 1200 employees, 144 were absent. MegaStat's results for a twotailed test are shown below. At \( \alpha=.05 \), the two-tailed test for a difference in proportions is just barely significant. not quite significant. not feasible due to nonnormality. not appropriate because \( 1>p 2 \).