Use the Confidence Level and Sample Data to Find the Margin

Multiple Choice

Use the confidence level and sample data to find the margin of error E
-Systolic blood pressures for women aged $18 - 24 : 94 \%$ confidence; $n = 97 , \bar { x } = 114.8 \mathrm {~mm} \mathrm { Hg } , \sigma = 12.7 \mathrm {~mm} \mathrm { Hg }$

A) $2.2 \mathrm {~mm} \mathrm { Hg }$
B) $51.2 \mathrm {~mm} \mathrm { Hg }$
C) $2.4 \mathrm {~mm} \mathrm { Hg }$
D) $9.8 \mathrm {~mm} \mathrm { Hg }$