I need a gf if anyone there come and text with me i'm bored

What’s #16 asking me and how do i solve it?

What does si stand for,when referring to a system of measurement

Asynthetic fiber used in manufacturing carpet has tensile strength that is normally distributed with mean 75.5 psi and standard deviation 3.5 psi. how is the standard deviation of the sample mean changed when the sample size is increased from n equals 8 to n equals 47