Ivo Dinov UCLA Statistics, Neurology, LONI 

STAT 13 
Introduction to Statistical Methods for the Life and Health Science 
Department of Statistics 
Instructor: Ivo Dinov 
Homework 6 
Due Date: Friday, Nov. 21, 2008 
Index  Thymus Grand Weight 14 days  Thymus Grand Weight 15 days 
1  29.6  32.7 
2  21.5  40.3 
3  28  23.7 
4  34.6  25.2 
5  44.9  24.2 
n  5  5 
y^{}  31.72  29.22 
S  8.73  7.19 
Index  Control  Soap 
1  30  76 
2  36  27 
3  66  16 
4  21  30 
5  63  26 
6  38  46 
7  35  6 
8  45  
n  8  7 
y^{}  41.8  32.4 
S  15.6  22.8 
SE  5.5  8.6 

Sample Mean  Sample Standard Deviation  Sample Size 
Dark  92  13  4 
Photo period  115  13  4 
Successful:  n=22  mean=8.500  S=0.289 
Unsuccessful:  n=17  mean=8.441  S=0.262 
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