21. For the following experimental results, interpret specifically the relationship between the indepen- dent and dependent variables: llIll 35 Mean numberuferrnrs ll 1 1 3 4 5 6 T It Hours ulsleep deprivation 22. {a} If you participated in the study in question 21 and had been deprived of 5 hours of sleep, how many errors do you think you would have made? (b) If we tested all people in the world after 5 hours of sleep deprivation. how many errors do you think each would make? {c} What symbol stands for your prediction in part b