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Q. Two events are said to be ..................... , if any one of them cannot be expected to occur in preference to the other.

Q. An event whose occurrence is inevitable is called ......................................

Q. The definition of priori probability was originally given by ............................

Q. If two sets have no common element, they are called ....................

Q. The quantitative measure of correlation between two variables is known as.....................

Q. The coefficient of correlation between two variables, X and Y , will have negative sign when……

Q. ............................ refers to analysis of average relationship between two variables to provide a mechanism for prediction.

Q. Correlation analysis is a ............................analysis.

Q. A set of events are said to be ...................... , if the occurrence of one of them excludes the possibility of the occurrence of the other.

Q. Index numbers are