The article Linkage Studies of the Tomato Trans Royal Canad

The article \"Linkage Studies of the Tomato\" (Trans Royal Canad. Institute. 1931:1-19) reports the following data on phenotypes from a dihybrid cross of tall cut-leaf tomatoes with dwarf potato-leaf tomatoes. There are k=4 categories corresponding lo the four possible phenotypes, with the null hypothesis being The observations in each category are: 926 288 293 104 What is the expected observation in the second class for a Chi-square test for Goodness-of-Fit? Keep one decimal place.

Solution

we sum all the observations value = 1611

and we divided by 4 because we have 4 proportions

expected value for all the classes will be 1611 / 4 = 402.75