6. Variance and standard deviation are the most stable and are foundations for moreadvanced statistical analysis.7. Range is not a common measure of central tendency. 8. In a class of 100, the mean on a certain exam was 50, the standard deviation, 0.This means everyone had a score of exactly 50.9. If a distribution is skewed to the left, then it is Negatively skewed.10. Median is not a measure of variability. 11. The standard deviation is equal to square root of the Variance.12. If the sum of squares of nine sample values is∑x2=¿45.5 and their sum is∑x=¿17.5, then the variance of these values is 1.43.Measures of central tendency1. If a distribution is positively skewed, the median will not be smaller than themode.2. The mode is the value that occurs most often in a sample of data.3. Arithmetic mean is influenced by the extreme values in the distribution.4.Themeanandmedianforthefollowingdataset.7,8,10,9,7,6,7,14,16,5,8,5,16,7,10 is mean is 7, median is 7.