David has panic disorder. Over time he has developed a set o…

David has panic disorder. Over time he has developed a set of rituals and habits that are designed to avoid things that he feels may trigger a panic attack. Recently, this has progressed to the point where David no longer wants to leave the house as he fears that being in both open spaces and crowds makes him more likely to have a panic attack. David’s diagnosis now includes the following comorbidity:

The daily revenue at a USF bookstore has been recorded for t…

The daily revenue at a USF bookstore has been recorded for the past five years. The mean daily revenue is $1,500. The standard deviation is $500. The distribution is skewed to the right due to high-volume days (e.g., beginning of the semester, football game days, graduation). Suppose a random sample of 100 days is selected, and the average daily revenue is computed. Which of the following describes the sampling distribution of the sample mean?