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quiz 1A key.pdf, Quizzes of Statistics

Louisiana State University (LSU) - System OfficeStatistics
Prof. M. Mckenna

Material Type: Quiz; Professor: McKenna; Class: STATISTICAL ANALYSIS; Subject: Experimental Statistics; University: Louisiana State University; Term: Spring 2011;

Typology: Quizzes

2010/2011

Uploaded on 05/16/2011

tpowel3
tpowel3 šŸ‡ŗšŸ‡ø

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Revised 02/05/2010 2201_Quiz1A_KEY.docx
Page 1 of 2
EXST 2201
Quiz 1A KEY
Answers
1A. column a variable
row an individual
info in table body the data
1B. Body Style qualitative
Weight continuous
Number of Seats discrete
2A. Observational study
2B. Independent
2C. Without replacement
3. Experimental design Dependent
Experimental units 36 college students
Treatment Listening to Mozart and silence
Response variable Test scores
Answers Tips
4A. 0.025 rf = 118 477
0
ļ— = 0.025
4B. 616 crf = 249+117+249 = 616
Answers
5A. 7.5%
5B. 3 million
6A. 215
6B. 10
6C. 100-110
6D. Symmetric
7A. 23
7B. 40, 88
pf2

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Revised 02/05/2010 2201_Quiz1A_KEY.docx

Page 1 of 2

EXST 2201

Quiz 1A KEY

Answers 1A. column a variable row an individual info in table body the data 1B. Body Style qualitative Weight continuous Number of Seats discrete 2A. Observational study 2B. Independent 2C. Without replacement

  1. Experimental design Dependent Experimental units 36 college students Treatment Listening to Mozart and silence Response variable Test scores Answers Tips 4A. 0.025 (^) rf =^118 ąµ— 4770 = 0.

4B. 616 crf = 249+117+249 = 616 Answers 5A. 7.5% 5B. 3 million 6A. 215 6B. 10 6C. 100- 6D. Symmetric 7A. 23 7B. 40, 88

Revised 02/05/2010 2201_Quiz1A_KEY.docx

Page 2 of 2

Answers Tips 8A. 266 (^) ąµŒ^1862 ąµ— 7 = 266

8B. 266^ i^ =^10050 *7^ =3.

8C. 260 8D. 25 R = 282 ā€“ 257 = 25 8E. Sum of squares 426

Variance 71 Ļƒ^2 =^426 ( 7 āˆ’ 1 )=^71

Standard deviation 8.43 Ļƒ = 71 =8.

8F. They have the same spread.

9A. 6.15^ i^ =^10040 * 20^ =8.

9B. {0.2, 6.05, 6.45, 6.95, 8.2} 9C. 0.90 IQR = 6.95 ā€“ 6.05 = 0.