Given:
standard deviation = 20.2
sample size = 121
The formula for standard error of sampling distribution is:
[tex]\begin{gathered} SE\text{ =}\frac{\sigma}{\sqrt{n}} \\ Where\text{ }\sigma\text{ is the standard deviation} \\ n\text{ is the sample size} \end{gathered}[/tex]Substituting the given values:
[tex]\begin{gathered} SE\text{ = }\frac{20.2}{\sqrt{121}} \\ =\text{ 1.83636} \\ \approx\text{ 1.84} \end{gathered}[/tex]Answer: 1.84 (Option A)
