Mode is obvious. It's the only number that appears more than once: 5
Mean is just the arithmetic average: sum of all divided by 8: or 54.9/8 = 6.8625
Median is the middle of the numbers. There's 8, so take the average of the middle two numbers:
max of bottom 4 numbers is 5. Min of top 4 numbers is 5, Average of 5 and 5 is 5.
Median is 5, same as mode.
Mean is higher than median, meaning the data is skewed by the 22 in particular, an outlier. Outliers pull the mean above the median, if the outlier is the maximum. If the minimum they'd pull the mean lower than the median.
Standard deviation is the square root of the sum of the deviations from the mean, divided by n-1 where n = the total number of data points, or 8-1=7. One little complication though is that only applies when the data is a sample of the total population. IF 8 data points is the total population, then the formula for standard deviation is the square root of the sum of the deviations from the mean divided by n, or by 8 in this example. Usually, they do assume it's a sample not the total population, so the assumed formula divides by n-1 not n.
