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NES Math: Statistics Overview Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

Page 1

Question 1 1. What is data that is grouped in evenly distributed values and measured based on the group to which the variable is attributed?

Question 2 2. What is statistical estimation?

Question 3 3. Select the statement that represents discrete quantitative data.

Question 4 4. Analyze the following statements and indicate which one best describes the difference between the population and the sample.

Question 5 5.

Katie is collecting data about the number of people that are interested in different dance styles. After passing out a survey, she has gathered the following information:

Style / Number of people interested in this style

Ballet / 20

Jazz /12

Hip Hop / 8

Lyrical / 26

Tap / 10

What type of data did Katie collect?

Page 2

Question 6 6. Charlotte is part of her local track team. She can jump 4 hurdles and can long jump 5 feet 5 inches. There are seven girls and ten boys on her track team. Six of the team members are ranked among the top 10 regional athletes. Which piece of this data is discrete and which is continuous?

Question 7 7. All members of a specified group are referred to as what?

Question 8 8. Laura needs to conduct research for her statistics class. She has access to funding and a large number of volunteers for the research. The research requires that she attempt to make inferences about population parameters. Should she use convenience sampling? Why or why not?

Question 9 9. What is categorical data that assigns numerical values as an attribute to an object, animal, person or any other non-number?

Question 10 10. Which of the following is NOT an advantage of convenience sampling?

Page 3

Question 11 11. What is data that is collected in groups or topics, where the number of events in each group is counted numerically?

Question 12 12. In an experimental study, one group was required to water their lawn once a week and another was required to water three times per week. The control group did not water their lawn at all. Watering the lawn is the _____, and the number of times is the _____.

Question 13 13. What are the characteristics of a sample used to infer information about the population?

Question 14 14. Sandra is selling her new line of all natural make-up products and wants to know the popularity of certain colors among teenagers. She hands out a survey to all of the students in her teenage daughter's class and asks them to identify their favorite make up colors. Which is the population and which is the sample in this scenario?

Question 15 15. What do we call all the members of a specified group?

Page 4

Question 16 16. Sheila is a baker experimenting with a cake recipe. Specifically, she is monitoring how changes in the volume of cream affect the moistness of the cake. What kind of variable is the volume of cream, and why?

Question 17 17. Which of the following answers is an example of continuous data?

Question 18 18. The numbers on lacrosse jerseys are an example of _____ data.

Question 19 19. Jim is studying how differences in the the screen color of electronic devices make an impact on eye strain experienced by the user. In these experiments, which is the response variable and which is the explanatory variable.

Question 20 20. Madison is trying out for the track team. There are 26 people trying out for the team. There are 4 people wanting to run distance, 6 people wanting to pole vault, 8 people wanting to sprint, and 2 people that want to throw shot put. Madison can run a half mile in 6 minutes and she finished 6th in the 100 meter dash. Which of these pieces of data is discrete and which is continuous?

Page 5

Question 21 21. When researchers have a limited amount of time to collect data, they use convenience sampling because it is often:

Question 22 22. Alyssa wants to support a hypothesis of causation between how much a child has been read to before the age of 5 and their IQ level. She wants to collect data by conducting a survey of parents of grade school students and comparing it to the reported IQ levels of the students. Which type of study and variables does she need to use?

Question 23 23. Observational studies use:

Question 24 24. Brown school has decided to review their ratio of girls to boys in the Second grade class. They decided to count the number of boys in Second grade. This is an example of what type of data?

Question 25 25. What is data that cannot be divided, it is distinct and can only occur in certain values?

Page 6

Question 26 26. What do we call the group that remains untreated throughout the duration of an experiment?

Question 27 27. Bob proposed that the more you exercise, the more likely you are to be promoted at your job. He reviewed the exercise regimens of coworkers who were promoted and those that were not. In this example, exercise is a(n) _____ variable, and job status is a(n)_____ variable.

Question 28 28. Elizabeth is waiting for her flight at the airport. She decides to conduct an experiment. She wants to know how many people at the airport carry a laptop with them for their flight. She sees 50 people walk past her as she waits. Thirty of those people are carrying laptops. What is the population and sample in this scenario?

Question 29 29. What is the method used to choose members of a group to participate in an experiment?

Question 30 30. Which two are examples of descriptive statistics?

NES Math: Statistics Overview Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!