PSYC 2317 Chapter 9 Quiz - Blinn College

PSYC 2317 CHAPTER 9 QUIZ Question 1 5 out of 5 points 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? Selected Answer: dependent-samples t test Answers: single-sample t test z test standard deviation analysis dependent-samples t test Question 2 5 out of 5 points The t distribution allows researchers to generalize from Selected Answer: one sample to a larger population. Answers: one population to a larger sample. one sample to a larger population. one sample to another. one statistical test to another. Question 3 5 out of 5 points Why does one divide by N – 1 rather than by N when estimating a population standard deviation from the sample