Answer :
Answer:
Margin of error = 16.5
Step-by-step explanation:
The formula for the margin of error is given by :
[tex]M=z\times \dfrac{\sigma}{\sqrt n}[/tex]
We have, z (for 90% confidence interval) = 1.65
σ = 50 and n = 25
Putting all the values in the above formula, we get :
[tex]M=1.65\times \dfrac{50}{\sqrt {25}}\\\\M=16.5[/tex]
So, the margin of error for a 90% confidence interval is 16.5.