CK-12 Probability and Statistics - Advanced

http://www.ck12.org Chapter 1. An Introduction to Analyzing Statistical Data

Review Answers

1. (a) 69.3 inches (b)

TABLE1.12:

Year Rainfall (inches) Deviation Squared Deviations

1998 90 20. 7 428. 49

1999 56 − 13. 3 176. 89

2000 60 − 9. 3 86. 49

2001 59 − 10. 3 106. 09

2002 74 4. 7 22. 09

2003 76 6. 7 44. 89

2004 81 11. 7 136. 89

2005 91 21. 7 470. 89

2006 47 − 22. 3 497. 29

2007 59 − 10. 3 106. 09

Sum→ 2076. 1

Variance: 230. 68

Standard Deviation: 15. 19

2. RANGE: 1293 IQR: 498


3. 
   
   
   
   387. 03
   
   
   
   


4. a


5. b

Further Reading

• http://mathcentral.uregina.ca/QQ/database/QQ.09.99/freeman2.html


• http://mathforum.org/library/drmath/view/52722.html


• http://edhelper.com/statistics.htm


• http://www.newton.dep.anl.gov/newton/askasci/1993/math/MATH014.HTM

Vocabulary

Range

The maximum value in a data set minus the minimum value.

Interquartile Range (IQR)

The upper quartile in a data set minus the lower quartile.

Deviation

The difference of the mean of a data set subtracted from the actual data value.