1. Washington receives an average of 2380 mm of rainfall annually, with a standard deviation of 100 mm. What is the variation coefficient? Give your response's value to two decimal places. You should not use the % symbol in your response.

2. In a city school, the distribution of students per class is unclear. However, if 95 percent of the school's classrooms have between 25 and 32 students, what is the average number of students each class at the school? provide your response in a single decimal

3.The average monthly electricity consumption of families in a certain neighborhood is 89.5kwh, with a typical deviation of 10kwh. What is the variation coefficient? provide an answer in two decimal places The percentage should not be included.

4.Three sciences majors are evaluated to see if they suffer from anxiety. The number of outcomes in the sample space is?

5.The coefficient of variation is most useful when comparing two variables that have roughly the same mean and standard deviation. true or false

6. In the 4x100m athletic event, four runners run 100m apiece, with the first three racers handing the baton to the next until the 400m is completed. The team was certain to win. successfully. Let S represent a successful baton pass and F represent a failed baton pass. draw a tree diagram for the team to show this outcome.

7. A game has two stages. Participants must first roll a fair six-sided die; if the roll results in a number 1 or 6, the participant may proceed to the second stage; otherwise, the participant must leave the game. The second step is a fair coin flip; if the toss results in a head, the participant wins the game. Create tree diagrams that better represent the game's outcomes.

8.Approximately 100% of a distribution is contained within three standard deviations of the mean. true or false