A random sample of 108 light bulbs had a mean life of

Thank you for the opportunity to help you with your question!

90 % C.I. for μ = xbar+/- Margin of error

margin of error= zσ/sqrt(n)= 1.645*36/sqrt(108)=5.7477

90 % C.I. for μ = (547 - 5.7,547+5.7)=( 541, 553 )

Secure Information

Content will be erased after question is completed.

Enter the email address associated with your account, and we will email you a link to reset your password.

Forgot your password?

Sign Up