Chi-square test, goodness of fit

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Department
Soil + Crop Sciences
Course
SOCR 330
Professor
Sarah Ward
Semester
Fall

Description
2 September Chi-Square Test for Goodness of Fit A simple statistical method based on probability theory Used to compare observed with expected numbers Valuable statistical test to detect deviation from Mendelian ratios Using the Chi-Square Test for Goodness of Fit You suspect flower color in poppies is controlled at a single locus with red R dominant to white r You cross Rr x Rr and get 100 offspring Based on Mendelian genetics you predict a 3:1 ratio so you expect 75 red poppies and 25 white poppies You actually get 61 red and 39 white Was your hypothesis correct? (O –E)2 Class Observed Expected
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