Trace out the WRONG option from the following: (CLI= Cost of living index numbers)

The correlation coefficient between two variables X and Y is 0.4. The correlation coefficient between 2X and (­Y) will be :

Suppose a person would earn Rs. 10,000 in base period. Suppose the cost of living index increases by 20over base period. Then the employers of that person increase his salary by Rs. 1500. Which of the following option is TRUE?

In drawing a sample of size n under SRSWR from a population of size N, the probability that a specified member is included in the chosen sample is

If a population consists of 10 units and SRSWOR is adopted, the probability of selecting a specified sample of 2 units is :