Against all odds: Inside Statistics, Unit 12, Correlation
directed by Graham Chedd, fl. 1973; presented by Pardis Sabeti, 1975-; produced by Maggie Villiger, fl. 1999 and Graham Chedd, fl. 1973, Chedd-Angier Production Company, Inc., in Against all odds: Inside Statistics, Unit 12 (District of Columbia: Annenberg Learner, 2014), 11 mins