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Statistics questions

Statistics
Tutor: None Selected Time limit: 0 Hours

Apr 20th, 2015

old new d
73 72 -1
77 80 3
91 88 -3
80 75 -5
86 89 3
76 72 -4
93 92 -1
81 79 -2
   
average -1.25  
standard deviation(s) 2.96407056  
t-statistic -1.192  
t-ststistic positive 1.192  
t-statistic=(mean of d)*(n-1)^0.5/s=-1.192

May 1st, 2015

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Apr 20th, 2015
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