QUESTION 20 3 points Saved Exhibit 5A In order to determine whether or not a par
ID: 3228530 • Letter: Q
Question
QUESTION 20 3 points Saved Exhibit 5A In order to determine whether or not a particular medication was effective in curing the common cold, one group of patients was given the medication, while another group received sugar pils. The results of the study are shown below: Patients cured Patients not cured Received medication 90 60 Received sugar pills 40 60 We are interested in determining whether or not the medication was effective in curing the common cold. We are using the test of dependence to see whether variable 1 (cured or not cured) is independent from variable 2 (medication or sugar pills) Expected Frequencies Patients not cured Patients cured Received medication Received sugar pills Question 20Explanation / Answer
from above :
20)option A
21)option b is correct
22)option C
23) degree of freedom =1
24) option A
Observed O patients cured not cured Total receieved medication 90 60 150 receieved sugar pills 40 60 100 Total 130 120 250 0.6 Expected E=rowtotal*column total/grand total patients cured not cured Total receieved medication 78.0 72.0000 150 receieved sugar pills 52.0 48.0 100 Total 130 120 250 chi square =(O-E)^2/E patients cured not cured Total receieved medication 1.846 2.0000 3.846 receieved sugar pills 2.769 3.000 5.769 Total 4.615 5.000 9.6154