Answer:
n=601
Step-by-step explanation:
Formula used:
[tex]n=z(\frac{\alpha }{2})^2\frac{p(1-p) }{E^2}[/tex]
Solution:
[tex]n=z(\frac{\alpha }{2})^2\frac{p(1-p) }{E^2}[/tex]
Where,
[tex]\frac{\alpha }{2}=0.025[/tex]
As there is no previous estimate for p
Then, p=0.5
Here on using the table
[tex]z(\frac{\alpha }{2}) =1.959963985[/tex]
Also,
E=0.04
p=0.5
Thus,
n=600.2279407
On approximating the value,
n=601
