Evaluate the following as True or False 1. The correlation between height and weight is a negative correlation. a) True b) False 2. If the mean of n observations x1,x2,x3,, is x then algebraic sum of deviations of all observations taken from mean is always zero. a) True b) False 3. The value of standard deviation for any data always be positive. a) True b) False 4. In order to measure the variability of two series or data sets, the best measure is coefficiedt of variation (CV). a) True b) False Compute to fill the correct answer (41=4Marhs) 5. Variance of the data 7,7,7,7,7 will be 6. The coefficient of variation for a series A is 58% and for the series B is 48%, then the series be more consistent. 7. If variance is 256 then standard deviation g will be 8. If variance 2=12L,n=15,X=180, then coefficient of variation (CV)= Part-B ANSWER ANY TWO QUESTIONS =72010015121100=(23=6Mar 9. A sample of 6 students has the mean marks as 4 . A second sample of 4 students has the mean ma 9. Find the mean of combined samples 10. If arithmetic mean and coefficient of variation (CV) of X values are 10 and 50 respective compute the variance of Y if Y=152X