A Psychologist Is Interested in Whether Working Memory Is Influenced

Multiple Choice

A psychologist is interested in whether working memory is influenced by sleep loss.The psychologist administers a measure of working memory to a group of subjects at 8 a.m..on Day 1 of the study and then again at 8 a.m.on Day 2 of the study, after keeping the subjects awake the entire night.Does sleep loss affect working memory? What statistical analysis should be performed to answer this question?

A) single-sample t test
B) z test
C) standard deviation analysis
D) paired-samples t test