Consider the following statements:
1. If 10 is added to each entry on a list then the average increase by 10.
2. If 10 is added to each entry on a list, then the standard deviation increase by 10.
3. If each entry on a list is doubled, then the average doubles.
Which of the above statement are correct?

The standard deviation for the set of the numbers 1,4,5,7,8 is 2.45. If 10 is added to each number then new standard deviation is

The standard deviation for the set of the numbers 1,4,5,7,8 is 2.45. If 10 is added to each number then new standard deviation is

If 40 is added to a list of natural numbers , the average is increased by 4. When 30 is added to the new list , the average of the number in the new list is increased by 1. How many numbers were is the original list ?

The standard deviation for the set of numbers, 1,4,5,7,8 is nearly 2.45. If 10 are added to each number, then the new standard deviation will be

The standard deviation for the set of numbers 1, 4, 5, 7, 8 is 2.45 nearly. If 10 are added to each number, then the new standard deviation will be :

The mean of 100 observations is 40 and their standard deviation respectively is 10. if 5 is added to each observation then the new mean and new standard deviation will be

Consider the following statements : (i) Mean of 100 observations is 50 and standard deviation is 10. If 5 is added to each observation the new mean and standard deviation are 55, 10. (ii) Mean of 100 observations is 50 and standard deviation is 10. If each observation is multiplied by 3 then the new mean and standard deviation are 50, 10/3. The true statements are :

Consider the following statements : (i) Mean of 100 observations is 50 and standard deviation is 10. If 5 is added to each observation the new mean and standard deviation are 55, 10. (ii) Mean of 100 observations is 50 and standard deviation is 10. If each observation is multiplied by 3 then the new mean and standard deviation are 50, 10/3. The true statements are :

Consider the following statements: 1 Both variance and standard deviaiton are measures of variability in the population. 2. Standard deviation is the square of the variance. Which of the above statements is/are correct?