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Q. One where measurements are only approximations and are expressed in class intervals ie within certain limits is

Q. ……………… is the middle value in the distribution when it is arranged in descending or ascending order.

Q. In ………… observation, the researcher acts both as an observer and a participant

Q. A questionnaire is a devise that is most frequently used in collecting ………. Data.

Q. ……………. Are specialized types of database.

Q. ………………..error is known as non- cumulative error.

Q. The …………..method consists of studying several individual cases and drawing generalization.

Q. …………. Analysis is a mathematical tool which is used to describe the degree to which one variable is linearly related to each other.

Q. ………… surveys are used to gather information on a population at a single point in time.

Q. ……….is defined as the square- root of the average of the squared deviation from the mean.