6               138,548 134,012               132,908 137,055               136,018 133,732               131,843 123,552               121,641 121,139               118,723 128,293               125,532 124,631               120,249 124,609               122,77

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
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how can a two sample t-test help determine whether this data is attributable to chance factors?

The question of whether Friday the 13th is an unusually unlucky day or whether this idea is just superstition was evaluated. Researchers in the United Kingdom examined the relation between (a)numbers of traffic accidents on past Friday the 13ths versus (b) numbers of accidents occurring on Friday the 6ths (all between July 1990 and November 1992)

Friday the 6th      Friday the 13th

139,246               138,548

134,012               132,908

137,055               136,018

133,732               131,843

123,552               121,641

121,139               118,723

128,293               125,532

124,631               120,249

124,609               122,770

117,584               117,263

 

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