Unit 2 Inferences Re-Assessment

Name:
Unit 2 Assessment – Inferences
Find the mean, median, mode, range, Q1, Q3, MAD, minimum, maximum and draw a Box-and-whiskers plot.
Round to the nearest tenth.
Temperatures (˚F), (both high and low) over the next few days in Denver, Colorado.
2, 5, 4, 1, 6, 7, 4, 3, 2, 1, 1, 3, 4, 3, 2
1. Mean ___________
2. Median __________
3. Mode ___________
4. Range ___________
5. Q1 ______________
6. Q3 ______________
8. Minimum ________
9. Maximum ________
10. Box and Whiskers
Test averages in seventh grade math class: 13, 13, 10, 8, 7, 6, 4, 5, 14, 12, 4, 2, 9, 8, 8, 12
11. Mean ___________
12. Median __________
13. Mode ___________
14. Range ___________
15. Q1 ______________
16. Q3 ______________
18. Minimum ________
19. Maximum ________
20. Box and Whiskers
Tomato Plants: The heights (in inches) of eight tomato plants are: 20, 30, 35, 24, 36, 47, 48, 50, 23, 21, 23, 36
21. Mean ___________
22. Median __________
23. Mode ___________
24. Range ___________
25. Q1 ______________
26. Q3 ______________
28. Minimum ________
29. Maximum ________
30. Box and Whiskers
A teacher decides to survey the students in her classes to find out their opinion on the new menu in the
cafeteria. Identify the population and the sample. Give a reason why the sample could be biased.
a. Population: All people who eat at the school cafeteria
Sample: All students of a particular teacher at the school
Possible Bias: Some students could be absent on the day of the survey.
b. Population: All students of a particular teacher at the school
Sample: All people who eat at the school cafeteria
Possible Bias: The teacher does not teach all students in the school, and more
than just students eat at the school cafeteria.
c. Population: All people who eat at the school cafeteria
Sample: All students of a particular teacher at the school
Possible Bias: The teacher does not teach all students in the school, and more
than just students eat at the school cafeteria.
d. Population: All students of a particular teacher at the school
Sample: All people who eat at the school cafeteria
Possible Bias: This teacher preferred the old menu to the new one.