Explain the difference between a stratified sample and a cluster sample. (select all that apply.) in a cluster sample, the only samples possible are those including every kth item from the random starting position. in a cluster sample, every sample of size n has an equal chance of being included. in a stratified sample, random samples from each strata are included. in a stratified sample, the only samples possible are those including every kth item from the random starting position. in a cluster sample, the clusters to be included are selected at random and then all members of each selected cluster are included. in a stratified sample, every sample of size n has an equal chance of being included. in a cluster sample, random samples from each strata are included. in a stratified sample, the clusters to be included are selected at random and then all members of each selected cluster are included.