Which measure is the same as the standard error of the mean?

Astore sells two types of radios. one type sells $87 and the other for $119. if 25 were sold and the sales were $2495, how many of the $87 radios were sold a) 5 b) 20 c) 15 d)10

Mia’s gross pay is 2953 her deductions total 724.15 what percent if her gross pay is take-home pay

Which represents the number of times all outcomes less than a given outcome occur? cumulative frequency relative frequency frequency cumulative relative frequency