Answer
$\mu=16$
$\sigma^2=12.8$
$\sigma=3.58$
Work Step by Step
$q=1-p=1-.2=.8$
$\mu=np=80(.2)=16$
$\sigma^2=npq=80(.2)(.8)=12.8$
$\sigma=\sqrt {12.8}=3.58$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.