ERIC Number: ED079392
Record Type: RIE
Publication Date: 1972-Oct
Reference Count: 0
Project TRACE: Research and Evaluation of Follow-Up Studies of High School Graduates Using Sampling Techniques.
Harris, William; And Others
Research was conducted to determine whether statistical sampling techniques' could be applied effectively in followup studies of high school graduates and, if so, what sampling model is most appropriate. Records at four high schools in the Santa Barbara area were examined to develop statistical, demographic profiles of two populations, the 1970 and 1971 graduates. A questionnaire was sent to each graduate. Three weeks later a second questionnaire was sent to non-respondents, and three weeks after that non-respondents were interviewed by telephone. Data from 78% of the 1970 and 82% of the 1971 graduates were thus obtained. Examination of the statistical profiles of respondents revealed the questionnaire data to be representative of the entire population. Differences in response rates and in responses to questionnaire items were analyzed and found to be related to sex, ethnic background, and grade point average. Subsequently, random and stratified-random samples of different sizes were drawn from the respondent pools. Samples of the latter type were stratified on combinations of sex, ethnic background, and GPA. Several behavioral and attitudinal questionnaire items were selected to evaluate the effectiveness of the sampling models. It was found that the stratified-random sample models provided more accurate results than the random sample models. Several criteria for selecting the proper sample size are discussed. (Author/KM)
Publication Type: N/A
Education Level: N/A
Sponsor: California State Dept. of Education, Sacramento. Div. of Vocational Education.; Santa Barbara County Schools, Goleta, CA.
Authoring Institution: Human Factors Research, Inc., Goleta, CA.