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 :
Consider simple random sampling with replacement from a population of size N. The number of samples of size n is
The coefficient of range of the weights of 10 students from the following data:
41,20,15,65,73,84,53,35,71,55 is
In simple random sampling of n units from a population of N units the quantity [1 (n/N)] is called the
If x and y are uncorrelated variables then this implies :
In the construction of cost of living index, commodities are selected by :
For determination of mode and median graphically, one considers:
