June 27th, 2009, 02:42 AM
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 | Flow Master | | Join Date: Dec 2007 Location: Zeitgeist
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Quote:
Originally Posted by larz  According to a theory, four categories of strawberries are supposed to occur in the ratio 9:3:3:1. For these four categories, 124, 30, 43 and 11 were counted, respectively. Are these compatible with the theory?Let  .
Work so far-
124+30+43+11=208
Expected values are therefore 117, 39, 39, 13 for the ratio 9:3:3:1
(4 columns - 1)=3 degrees of freedom
I calculated the Chi-test statistic by doing (124-117)^2/117+....+(11-13)^2/13 and got 3.21, but I am not sure what to compare it to or what to do with the . Thanks for your help! | df = 4 - 1 = 3.
Critical value for 3 df at 0.05 significance level is 7.81 (got from tables).
3.21 < 7.81 therefore ......
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