A major coporation in chicago noticed that last year employee's averaged 5.8 sick days during the winter season. To try and reduce absences, the company offered flu shots this year. For a sample size of 30 people who took the shots, the average number of absences was M=3.6 with a sum of squares =396. Did the administration of flu shots significantly reduce absentieeism?
A.) State null and alternative hypothesis
B.) Indicate the df, the alpha, and the t critical value
C.) Calculate t-stat (include standard deivation, standard error, and t-value)
D.) Calculate Cohen's d and r^2.