Answer:
Expected count frequency= 17*50/88= 9.659
Explanation:
Members Living More Members Living Less Total
Than 25 Miles Than 25 Miles
from the Waterfall from the Waterfall
Low 25 17 42
Medium 8 21 29
High 5 12 17
Total 38 50 88
We see that the total of the high row is 17 and the total of the members living less than 25 miles from the waterfall is 50 .
So using the formula :
Expected count frequency= row total * column total/ grand total
= 17*50/88= 9.659
All the expected frequencies can be found in a similar way and then compared to the observed frequency to test the chi square.