If the null is rejected, there is the alternative which is called the alternative hypothesis and it takes the part of the null if it is not true. An example of a null hypothesis is: There is no difference in score between males and females in mathematics. The research question will be: Is there any difference between the scores of females and males in mathematics? 5. Sampling is inferential statistics where a sample is collected to explain the traits of a certain population. There are many types of sampling; random sampling where each element has an equal chance of being selected, stratified sampling where the population is put in states each containing members with the same kind of traits (homogeneous), cluster sampling where members are clustered and then there is systematic sampling where members are selected according to a certain criteria say the kth element. In data collection, several ways exist. A questionnaire is one the ways of collecting data. Questionnaires are the most used in data collection due to the fact that; the participant gives more information than he/she would have given in any other method. Also, the designer will have the freedom to control some responses making it easy to analyze the data. The open-ended questions give the researcher an advantage since more information will be delved using them. Further, the participant can answer them at his/her own pace; there is no strict deadline on when to deliver the filled questionnaires (Creswell, W. J 2003).
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