Random numbers are also called________?

Suppose for 40 observations, the variance is 50. If all the observations are increased by 20, the variance of these increased observation will be________?

The two regression co-efficient always have the ________ sign?

An Index number which measure the change of a ________ is called Aggregative 1. No?

A continuous random variable which can assume all possible values on scale in a given ________?

In regression the sign of (B’s) and (r)?