PHS421 Email: bbcnoun@gmail.com Whatsapp: 08131667008 A measure of premature mortality in a population is known as Answer: years of life lost The ratio between sample size and population size is called Answer: sampling fraction Which of the following is not a measure of central tendency . Answer: variance Correlation coefficient usually “r� lie between Answer: -1 & +1 Studying a sample is cheaper than studying the entire population . Answer: yes Which of the following is a non-parametric test Answer: chi - square When the chance of selection is unknown in a study it is called . Answer: non probability sampling The basic unit around which a sampling procedure is planned is known as Answer: sampling unit A group of individuals taken from a larger population is known as . Answer: sample A population index relating new occurrence of a disease is known as Answer: incidence Which of the following test methods is best used for a mean comparison test in a group of 4 Answer: anova is an event and its measurement such as blood pressure. Answer: observation The group of people to whom the result of a study is applied is called . Answer: population The process of selecting a number of individuals for a study in such a way that the individuals represent a larger group from which they were selected is called Answer: sampling Which of the following is a measures of dispersion from the mean . Answer: variance A list of the individual sample units in the population is commonly known as Answer: sampling frame A group consisting of units such as village, schools, etc. is known as . Answer: cluster A measure of the most frequently occurring observation in a series is known as Answer: mode A technique where every member in the population has equal chance of being selected in a study is called Answer: random sampling Every research study starts with identification of Answer: research problem Email: bbcnoun@gmail.com Whatsapp: 08131667008