Exhibit 11-1. In order to determine whether or not a particular medication was e

Question

Exhibit 11-1. 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 pills. The results of the study are shown below.

Patients Cured

Patients Not Cured

Received medication

70

10

Received sugar pills

20

50

We are interested in determining whether or not the medication was effective in curing the common cold.

Refer to Exhibit 11-1. The expected frequency of those who receive medication and are cured is

70

28

48

150

Patients Cured

Patients Not Cured

Received medication

70

10

Received sugar pills

20

50

Explanation / Answer

Solution:

expected frequency of those who receive medication and are cured is

Expected E (row toal*column total)/grand total)

=80*90/150

=48

Correct Option is C

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