Determine whether the following statement is true or false. explain. when obtaining a stratified​ sample, the number of individuals included within each stratum must be equal. choose the correct answer below. a. true. sampling the same number of people from each stratum will result in a sample that is representative of the population at a lower cost than a simple random sample. b. false. when taking a stratified​ sample, a simple random sample is drawn from one stratum at random. all other strata will not be included in the sample. c. false. a stratified sample is constructed by successively selecting a stratum at random and then selecting a random individual from within that stratum. with this​ process, it is unlikely that all strata will be sampled from the same number of times. d. false. within stratified​ samples, the number of individuals sampled from each stratum should be proportional to the size of the strata in the population.