①DATA Surveys If the data needed to answer a question are not available from routinely kept records, then logical source may be a survey. For example the administration of the health department want to learn the numbers of hypertension in Zhengzhou, we may conduct a survey
① DATA Surveys If the data needed to answer a question are not available from routinely kept records, then logical source may be a survey. For example, the administration of the health department want to learn the numbers of hypertension in Zhengzhou, we may conduct a survey
①DATA Experiments Frequently the data needed to answer a question are available only as the result of an experiment For example a nurse wish to know which of several strategies is best for maximizing patient compliance
① DATA Experiments Frequently the data needed to answer a question are available only as the result of an experiment. For example, a nurse wish to know which of several strategies is best for maximizing patient compliance
①DATA External sources The data needed to answer a question may already exist in the form of published reports For example, statistical yearbook, population census
① DATA External sources The data needed to answer a question may already exist in the form of published reports. For example, statistical yearbook, population census……
② STATIST|cS A science dealing with the collection analysis, interpretation and presentation of masses of numerical data Websters international dictionary
② STATISTICS A science dealing with the collection, analysis, interpretation and presentation of masses of numerical data ----Webster’s international dictionary