Eric wants to estimate the percentage of elementary school children who have a social media account. He surveys 450 elementary school children and finds that 280 have a social media account.
Identify the values needed to calculate a confidence interval at the 99% confidence level. Then find the confidence interval.
Use the table of common z-scores above.
Provide your answer below:
$p'=\ $p′=
$\sigma_{p'}\ =\ $σp′ =
$z_{\frac{\alpha}{2}}\ =\ $zα2 =
(, )
Already registered? Login
Not Account? Sign up
Enter your email address to reset your password
Back to Login? Click here