Standard Error Formula is
SE = [tex] \frac{s}{ \sqrt{n} }} [/tex]
where:
SE = standard error
s = standard deviation
n = number of observations of the samples
so in the given, 35 is the sample size
3.40 grams is the standard deviation
SE = [tex] \frac{3.4}{ \sqrt{35} } [/tex]
= [tex] \frac{3.4}{ \sqrt{5.91660797831} } [/tex]
≈ 0.65
