Student while doing an experiment finds the work done by an object varies with displacement s and it can be expressed as equation: W=XS^2+YS+Z
if units of W and S are expressed in terms of SI units ,determine the units of constants X, Y and Z in the given equation.​

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