A researcher is studying the effect of sleep deprivation on recall. Six participants are each tested twice on a recall task, once on a day when well rested (they had plenty of sleep the night before) and once when sleep deprived (they have had no sleep for 48 hours). Here are the recall scores:

Does sleep deprivation affect recall? (Use the .05 significance level.)
(a) Carry out a t test for dependent means using the actual scores.
(b) Carry out a square-root transformation of the difference scores (to keep things simple, round off the transformed scores to one decimal place).
(c) Carry out a t test for dependent means using the transformed difference scores.

Transcribed Image Text:

Participant Well Rested 16 18 10 Sleep Deprived 10 20 10 16