Question

classify the sample as random, systematic, stratified, or cluster. mall carriers of a large city are divided into four groups according to gender (male or female) and according to whether they walk or ride on their routes. then 10 are selected from each group and interviewed to determine whether they have been bitten by a dog in the last year. this represents a select sample.

Explanation:

Stratified sampling divides the population into subgroups (strata). Here, mall - carriers are divided into groups (strata) based on gender (male/female) and mode of travel (walk/ride). Then, a sample is taken from each stratum (10 from each group). This fits the definition of stratified sampling. Random sampling would involve selecting individuals randomly without dividing into groups. Systematic sampling selects individuals at regular intervals. Cluster sampling divides the population into clusters and selects entire clusters.

Answer:

stratified