Let mean of 100 data points be 55 and variance be 16. Now if every data point is increased by 2 units, then the sum of mean and standard deviation of new data points will be `70` 2. `59` 3. `63` 4. `61` 5. `55`

Let mean of 100 data points be 55 and variance be 16. Now if every data point is increased by 2 units, then the sum of mean and standard deviation of new data points will be (1). 71 (2). 59 (3). 63 (4). 61

If each data point in a set is increased by 7, does the set's standard deviation increase, decrease, or remain constant?

Find the mean variance and standard deviation for the following data: 2,4,5,6,8,17

The mean of 5 observations is 5 and their variance is 12.4. If three of the observations are 1,2 and 6, then the mean deviation from the mean of the data is

Find the sum of the deviations of the data 4,5,7,9 and 15 from their mean.

Find the mean, variance and standard deviation for the following data: 6,7,10,12,13,4,8,12

Find the variance and standard deviation of the following data 5,12,3,18,6,8,2,10

Find the mean , mean deviation about the mean , variance and standard deviation for the following data 4,15,14,12,6,8,11

The mean deviation of the data 2,7,9,11,15,16 from the median is

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 :