Use the following to answer questions :
A clinic administers two drugs to two groups of randomly assigned patients to cure the same disease: 70 patients received Drug I and 80 patients received Drug II.The following table gives the information about the numbers of patients cured and those not cured by each of these two drugs.
-For a chi-square test of homogeneity for this contingency table,what are the expected frequencies for the first row,rounded to two decimal places?
Definitions:
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