Of the following features, select all that would typically be used to abandon the assumption of normality?
◯ The data set contains more than one mode.
◯ The data set exhibits a high degree of skewness.
◯ The data set contains an outlier.
◯ There are negative values in the data set.
◯ The data set has a large standard deviation.
◯ The data set has a mean of 0.