When you approach a traffic light and see a red light, you stop. On the other hand, when you approach that same light and see a green light, you continue driving. This example illustrates

Which of the following individuals is likely to have a longer-than-usual circadian rhythm?

a. ?Lisa, who has to get up every morning at 6:30 a.m., just before sunrise, to teach classes that begin at 8:00 a.m. b. ?Dan, who has worked on a submarine far below the surface of the water for the last 3 months. c. ?Jennifer, who works a usual 9 to 5 shift most days but is occasionally asked to work an overnight shift. d. ?Ira, who spends most of his days working inside the “Bird House” at his city’s local zoo.

When comparing the mean of a sample of 30 people to the population mean, the degrees of freedom are 31

Indicate whether the statement is true or false