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A randomly selected sample of 100 students had an average grade point average (GPA) of 3.2 with a standard deviation of 0.2.

The standard error of the sample mean is:
A. 0.020
B. 0.200
C. 1.600
D. 2.000

Respuesta :

Answer:

A. 0.020

Step-by-step explanation:

we calculate the standard error of the sample mean with the formula,

[tex]E=\frac{s}{\sqrt{n} }[/tex],

with E= standard error of the sample mean

s= standard deviation

n= sample

So,

s= 0.2

n= 100

[tex]E=\frac{0.2}{\sqrt{100} } =\frac{0.2}{10}=0.02[/tex]