The current study explored the relationship between courtship violence and the exploitativeness/entitlement factor of overt narcissism, covert narcissism, and sexual narcissism. Data were analyzed from 63 currently dating couples on their own and partner's aggression using the CTS2. All were white, heterosexual students from a small US college in Central Pennsylvania. An interdependence analysis showed that correlations were entirely explained at the individual-level, thus demonstrating that gender is a key element in understanding narcissism and courtship violence. For women, exploitativeness/ entitlement was significantly correlated with sexual coercion in both dating partners. For men, covert narcissism was correlated with physical assault and sexual narcissism was correlated with their partner's sexual coercion. Narcissism also influenced some discrepancies in self-and partner-rated aggression.

Electrocardiogram (ECG) data from patients with a variety of heart conditions are studied using ordinal pattern partition networks. The ordinal pattern partition networks are formed from the ECG time series by symbolizing the data into ordinal patterns. The ordinal patterns form the nodes of the network and edges are defined through the time ordering of the ordinal patterns in the symbolized time series. A network measure, called the mean degree, is computed from each time series-generated network. In addition, the entropy and number of non-occurring ordinal patterns (NFP) is computed for each series. The distribution of mean degrees, entropies, and NFPs for each heart condition studied is compared. A statistically significant difference between healthy patients and several groups of unhealthy patients with varying heart conditions is found for the distributions of the mean degrees, unlike for any of the distributions of the entropies or NFPs.

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Summary A classroom activity is presented, which can be used in teaching students statistics with an easily generated, large, real world data set. The activity consists of analyzing a video recording of an object. The colour data of the recorded object can then be used as a data set to explore variation in the data using graphs including histograms, quantile–quantile plots and scatterplots, and to indicate possible formal analyses.

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