Global Journal of Human Social Science, G: Linguistics and Education, Volume 22 Issue 4

2016). Mugenda and Mugenda (2016), defines target population as that population to which the researcher wants to generalize the result of the study. The target population in this research study was public secondary schools. according to the principal, the selected school had 195 students taking physics. Physics teachers were targeted as they were the major agents of curriculum implementation in the schools. c) Sampling design Sampling is a process of selecting a part of population on which research will be conducted, in order to ensure that conclusions form the study may be generalized to the entire population. Simple random sampling procedure will be used in selecting the required sample for this study. A sample is a smaller group obtained from the accessible population from which data is collected. The study focused on a third percentage of the target population which gives 33.33%. According to Mugenda and Mugenda (2015), 20-50% percent sample size of the target population is enough for descriptive survey. d) Research instruments Questionnaires of both open and closed ended questions were used in this study. Some questions will have Yes or No or True or False alternatives. Teacher’s and student’s questionnaire will be designed. Questionnaire is a technique of data collection in which the respondent completes it at his/her convenience. The questionnaires targeted 65 students and teacher which is 33% of the target population comprising of 60 students and 5 teachers. i. Questionnaire for teachers The purpose of this questionnaire was to establish the how frequent the teachers carries out practical and how he conducts the practical. This enabled to find out the view of the importance of practical by the physics teacher on performance. ii. Questionnaire for students The purpose of this questionnaire was to establish the how frequent the student attend physics practical and how the practical is conducted. This enabled to find out the view on the importance of practical by the physics students on performance. e) Validity Validity of the research instrument is the ability of an instrument to measure what it is designed to measure. According to Kumar (2015), the judgement that an instrument is measuring what it is supposed to is primarily based upon the logical link between the questions and the objectives of the study. To ensure validity the instruments were reviewed under the guidance of peers in the faculty. Orodho (2015) recommends that questionnaires be piloted established whether the questions are clear or whether the questions are ambiguous and whether the questions provoke response. f) Reliability Reliability of a research instrument is the degree of accuracy or precision in the measurements made by the research instrument (Kumar, 2015). Therefore, a measuring instrument is reliable if it provides consistent results (Kothari, 2016). The results from piloting were used to determine the level of the reliability of the instruments. All the items in the instruments were related to the research topic. The reliability of the instruments was reflected on the items that were structured in simple English language, which the respondents found easy to understand and internalize. g) Data collection procedure Questionnaires are appropriate for gathering the views of ma large number of people about a particular phenomenon (Cochran, 2017). Questionnaires of both open and closed ended questions were used in this study. Some structured questions will have either Yes or No or True or False alternatives. All the questions in the questionnaires will relate to the objective and the research question of the study. Questionnaires were administered to the sample population of teachers and students. The data collected from the population formed the basis of this research report. h) Method of data analysis The will study utilized descriptive analysis techniques such as frequency distribution, mean, median. Quantitative data were collected using the Microsoft excel while qualitative data were sorted, summarized and interpreted in line with the research questions and objectives. Data analysis results were presented both quantitatively in form of percentages, tables and figures, while qualitatively as descriptive text. IV. D ata A nalysis, P resentation and I nterpretation a) Research instrument’s return rate The respondent included 4 teachers’ questionnaire and 50 questionnaires from the students. this represented 80% and 83.3% respond rate respectively. This was considered adequate for analysis. According to Peil (2015), questionnaires return rate below 50% is considered not good for a study. b) Demographic data The demographic data considered in this study for the respondents included practicals, nature of practical and frequency of physics. Volume XXII Issue IV Version I 50 ( ) Global Journal of Human Social Science - Year 2022 © 2022 Global Journals G Effect of Physics Practicals on Students’ Academic Performance in Public Secondary Schools in Matayos Sub-County, Busia County, Kenya