Answer:
Number of People Selected for this Hypothesis = 84
Mean =M = 26.9 cm
Standard Deviation = S= 2.1 cm
[tex]Z_{Score}=\frac{X_{score}-M}{S}[/tex]
[tex]Z=\frac{84-26.9}{2.1}\\\\ Z=\frac{57.1}{2.1}\\\\ Z=27.190[/tex]
[tex]Z_{95 percent}=1.96[/tex]
Confidence Interval for this Data will be
27.190 -1.96 ≤ Z ≤ 27.190 +1.96
25.230 ≤ Z ≤ 29.15
Option C: 22.784 to 31.016.
