Question

Math Home | My Classes | Help | Log Out Sharmin Taher Calendar Gradebook all 2019 Assessment 2 Due Wed 11/13/2019 11:59 pm If n 390 and p (p-hat) -0.9, find the margin of error at a 90% confidence level. Round to 4 places. z-scores may be rounded to 3 places or exact using technology. Get help: Video Written Example License Points possible: 1 Unlimited attempts. Message instructor about this question Submit

Answer 1

Solution :

Given that,

Point estimate = sample proportion = $\hat p$ = x / n = 0.9

Z_$\alpha$/2 = 1.645

Margin of error = E = Z_{$\alpha$ / 2} * $\sqrt$ (($\hat p$ * (1 - $\hat p$ )) / n)

= 1.645 * ($\sqrt$((0.9 * 0.1) / 390)

= 0.0250

Margin of error = E = 0.0250