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. 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. b. false. within stratified samples, the number of individuals sampled from each stratum should be proportional to the size of the strata in the population. c. 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. d. 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.