Q5 Two-sample t-test Researchers are interested in whether the use of cell phones while driving impairs driver's reaction speed. In a simple random sample of 70 drivers, 35 are randomly assigned to the "Cell Phone" group and the other 35 are assigned to the control group. The drivers assigned to the control group listened radio while participating in a driving simulator, while the drivers assigned to the cell group carried out a phone conversation while participating in the simulation. For both treatments, the participants reacted to various simulated obstacles. The reaction times to the obstacles were recorded for all participants. The box plot below shows the reaction times for each group. 900 - 800 - 700 - Reaction Time 600 - 500 - 400 - Cell Control GroupGroup Sample Mean Sample Standard Deviation Sample Size Cell 586 97.5 35 Control 536 69.0 35 Q5.1 State the null hypothesis for testing whether there is a difference in average reaction time between the Cell Phone and Control groups. O Ho : Acell - Acontrol = 0 O Ho : Acell - Hcontrol 0 Q5.2 State the alternative hypothesis for testing whether the average reaction time for those using a Cell Phone is greater than the average reaction time for the Control group. O HA : Acell - Hcontrol > 0 O HA : Acell - Acontrol