Determine whether the stated sample size n is large enough

Question

Determine whether the stated sample size n is large enough, for the given value of p₀, to use the methods of this section to perform a test of hypothesis for p.

1. n = 500, p₀ = 0.05

2. n = 80, p₀ = 0.18

3. n = 100, p₀ = 0.40

4. n = 300, p₀ = 0.75

5. n = 120, p₀ = 0.01