Question

1. Given n=2500 and p=0.86, find the margin of error E that corresponds to a 99% confidence level

2. you are given a margin of error as three percentage points in a confidence level of 99%. If the same percentage from arecent poll is 35%, find the minimum sample size to estimate a population proportion.

corresponds to a 99% confidence (1 point) 1. Given n level. 2500 and β-086, find the margin of error E that 0.014 0.048 0.018 0 0.007 (1 pont 2. You are given a margin of error as 3 percentage points and a confidence level of 99%. If the sample percentage tom a recent poll is 35%, find the minimum sample size to estimate a population proportion. O 496 2579 O 1677 0 248

Answer 1

1)Margin of error E= z × sqrt( p (1-p)/n )

We have given population proportion and sample values let find z value from z table in 2 tail at 99% confidence.

2) sample n= (Z/E)^2 (p' (1-p'))

Given E and p values and find z value from z table at 99% confidence in 2 tail.

And always round the sample value to the next highest value

り Gwen Sample ,Y) 2500. f: population propooHon ะ 0.86 n. Yom 2- tablo 525086(o.u) 2.500 2.545 (0.00674) 2) Sample proportion, -35% 0.354 Sample , r) 2.525、2. о-оз ) Co-35 (045) (8s. 83 3 3 )-(0.2275) =