An estimator Tn of θ is said to be more efficient than any other estimator T ⋅_(n) of θ if and only if
The sample median is _______________ estimate for the mean of normal population.
The mean difference between 9 paired observations is 15.0 and the standard deviation of differences is 5.0. The value of statistic t is
Range of statistic t is
In a contingency table, the expected frequencies are computed under
The term regression was introduced by
The lines of regression intersect at the point
If a constant 50 is subtracted from each of the value of X and Y, the regression coefficient is
If p is the simple correlation coefficient, the quantity p2 is known as