Question

Out of a sample of 120 persons in a village, 80 were administered a new drug for preventing influenza and out of them 18 were attacked by influenza. Out of those who were not administered the new drug, 10 persons were not attacked by influenza: Prepare a two-way table showing frequencies.

Answer 1

The given data can be arranged in the following table.

	Drug administered	Drug not administered	Total
Attacked	18	-	-
Not Attacked	-	10	-
Total	80	-	120

The observed frequency table can be prepared as follows:

	Drug administered	Drug not administered	Total
Attacked	18	30	48
Not Attacked	62	10	72
Total	80	40	120