A team of cognitive psychologists studying the effects of sleep deprivation on shortterm memory decay had eight participants stay in a sleep lab for two days. Four participants were randomly assigned to a condition in which they were not permitted to sleep during that period, while the other four participants were allowed to sleep when they wanted to. At the end of the two days, the participants completed a shortterm memory task that yielded the results in the table that follows. Using the .05 signicance level, did sleep deprivation reduce shortterm memory? Mean Number of Letters Remembered Sleep Deprived Normal Sleep 7 9 8 8 7 11 9 7 a. Create the appropriate graph for this problem. b. Use the ve steps of hypothesis testing