Homework Question 6 Cont ." In one such comparison , you would like to compare the subjects in Walking group with those in Running and Biking groups . 81 ) Calculate the MS within ( the pooled variance ) . Make sure to use the right degrees of freedom ." 82) State the null hypothesis using symbols ( or words ) . 83) Conduct the statistic test using the appropriate standard error estimation ." 84 ) Which critical value should you use to compare to the obtained statistic ? Indicate the degrees of freedom and Type 1 error rate based on your calculation in f ( on p. 7 ) . 85 ) Should you retain or reject your null hypothesis based on your analysis