In survey conducted by quinnipiac university from october 25-31, 2011, 47% of a sample of 2,294 registered voters approved of the job barack obama was doing as president. what is the 99% confidence interval for the proportion of all registered voters who approved of the job barack obama was doing as president?

Confidence interval = [ 0.4432, 0.4968]

Step-by-step explanation:

Registered voters approved of the job Barack Obama was doing as president,

p = 47% = 0.47

Total sample size, n = 2,294

Confidence level = 99%

now,

confidence interval for the proportion of all registered voters who approved of the job Barack Obama was doing as president

= p ±

for 99% confidence level, z value is 2.58

= 0.47 ±

= 0.47 ± 0.0268

or

Confidence interval = [0.47 - 0.0268, 0.47 + 0.0268 ]

or

Confidence interval = [ 0.4432, 0.4968]

it could be a ..idk tho

where's the diagrams?