1] A researcher wants to find out if the variable "Number" has something to do with "DxPost" What statistical analysis should s/he perform?

Group of answer choices

a] Chi-square test of independence

b] linear regression

c] Chi-square goodness of fit test

d] independent samples t-test

Question 32 1 pts Exhibit 12-3 In order to determine whether a particular medication was effective in curing the common cold, one group of patients was given the medication, while another group received sugar pills. The results of the study are shown below. Patients Patients Cured Not Cured Received medication 70 10 Received sugar pills 20 50 We are interested in determining whether the medication was effective in curing the common cold. Refer to Exhibit 12-3. If the proportion of patients that are cured is independent of whether the patient received medication then the expected frequency of those who received medication and were cured is O 70 O 150 O 28 48