Answer Happy

Additional notes: 1. Coefficient of variation formula standard deviation s CV = Ex 100 x 100 mean 2. Z-scores The Z-score for each datum is calculated as: X-X S The Z-score measures the number of standard deviations a data value is away from the mean. A data value is considered as an outlier if Z <-3 or 2 > 3. 3. Skewness: Shape of the dataset based on comparing the mean and the median Left-skewed (or negative skewed) mean <median Symmetrically skewed mean = median Right-skewed (positive skewed) mean > median Left-Skewed Mean < Median Symmetric Mean = Median Right-Skewed Median < Mean M ^ Д) 25% 4. Quartiles Quartiles split the data (ordered array) into 4 segments with approximately) an equal number of data values per segment. 25% 25% 25% Active Q1 Q2 Q3 The first quartile, Q., is the value for which 25% of the observations are smaller. Q, is the to S same as the median (50% of the observations are smaller). Only 75% of the observations are less than the third quartile Q3-