Question

What is the margin of error for a poll with a sample size of 1550 people? Round your answer to the nearest hundredth of a percent.

Answer 1

SOLUTION:

From given data,

What is the margin of error for a poll with a sample size of 1550 people?

Sample size = n = 1550

Since no prior estimates ,

Let us assume

= 0.5

= 0.05

/2 = 0.05 / 2 = 0.025

Z_/2 = Z_0.025 = 1.96

Margin of error = E = Z_/2 * sqrt((1-) / n)

E = 1.96 * sqrt(0.5(1-0.5) / 1550)

E = 1.96 * 0.01270

E = 0.0249

E = 2.49 %

Margin of error =E = 2.49 %

Please thumbs-up / vote up this answer if it was helpful. In case of any problem, please comment below. I will surely help. Down-votes are permanent and not notified to us, so we can't help in that case.