{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Practice Exam 1

# Practice Exam 1 - Practice Exam 1 1 There are 15 numbers on...

This preview shows pages 1–4. Sign up to view the full content.

Practice Exam 1 1. There are 15 numbers on a list, and the mean is 25. The smallest number on the list is changed from 12.9 to 1.29. Circle the correct answer(s): a. The mean decreases by 0.774 b. It is impossible to calculate the change in the mean c. The median decreases by 0.774 d. The median remains unchanged Problems 2-4 A class of 60 students took a quiz. 15 students scored 4 points, 18 students score 3 points, 12 students scored 2 points, 9 students scored 1 point, and 6 students scored 0. 2. The mean quiz score for the class is 3. The standard deviation of the quiz scores is 4. The median of the quiz scores is Problems 5-7 Following is the stem-and-leaf plot for data on hazardous waste sites per state: Leaf unit:10 0 1234456889 1 000111222233456778899 2 023459 3 03789 4 0 5 58 6 7 7 8 1 9 6 10 27

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
5. What is the lowest number of hazardous waste sites per state? a. 0 b. 1 c. 0.1 d. 10 6. What is the shape of the distribution of hazardous waste sites per state? 7. What is the Q1 for the given dataset? a.10 b.11 c.100 d.10.5 8. For a right skewed distribution: Problems 9-10 There are two accepted methods for measuring latent heat of ice: an electrical method and a method that uses mixtures. He measured twelve samples using the electrical method: 79.98, 80.04, 80.02, 80.04, 80.03, 80.04, 79.97, 80.05, 80.03, 80.02, 80.00, 80.10 9. The first quartile of the dataset is: 10. The third quartile of the dataset is: a. 80.04 b. 80.075 c. 80.03 d. 80.05 11. The IQR of the dataset is:
12. The 90 th percentile of the dataset is:

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 10

Practice Exam 1 - Practice Exam 1 1 There are 15 numbers on...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online