Question

I would like to know if I have this question correct thank you

Answer 1

Remember that

For a 95% confidence interval --------> the value of z=1.960

Find out the value of

`Z(s)/(√(n))=1.960((12)/(√(36)))=3.92`

therefore

`\begin{gathered} 230\pm3.92 \\ 230+3.92=233.92 \\ 230-3.92=226.08 \\ therefore \\ The\text{ answer is} \\ (226.08,233.92) \end{gathered}`