Question

type your answer in exactly as one of the following: population, sample, srs, systematic, stratified, cluster, multistage, voluntary, convenience, survey, observation, experiment, undercoverage, response, nonresponse (answer the multiple choice with a uppercase letter) 1) a literacy group wants to determine whether high school students that participated in a recent reading program had higher standardized test scores than high school students that did not participate in the program. what type of study is this? 2) an srs of 25 students is taken from each grade to form the sample. this is what type of sampling design?

Explanation:

1. The study compares existing groups (participants vs non-participants) without manipulating variables, which is an observational study.
2. The population is divided into groups (grades, strata), and an SRS is taken from each stratum, fitting stratified sampling.

Answer:

observation
stratified