Under certain conditions, the standard deviation can be negative.
TrueFalse
Question 21 / 1 ptsA special interest group is conducting a survey regarding wolves in Yellowstone NationalPark. To adequately gauge opinions on both sides of the political spectrum, the researchers took the list of registered Democrats and selected a simple random sample of 100 people. Then, they took a list of registered Republicans and selected a simple random sample of 100 people. Which type of sampling scheme was implemented?
Question 31 / 1 ptsAt a school fund raiser, the name of every person who attended was entered into a drawing. At the end of the evening, six names were selected to receive door prizes. Which type of sampling scheme was implemented?

Question 41 / 1 ptsWhen designed experiments are conducted in a public school systems, researchers typically choose a particular district, and randomly select classes (for example fourth grade students in that district). The experiment is then conducted using all the students in the selected classes. Which type of sampling scheme is implemented?
Question 5
1 / 1 pts

The mean I.Q. test score in the United States is 100. Twenty randomly selected Statistics students took an I.Q. test, and the mean of their scores was 112. Which of these two numbers is a parameter and which is a statistic? (Mark ALL that apply)
100 is a parameter.112 is a parameter.100 is a statistic.112 is a statistic