Do rail workers really earn £13,000 a year more than nurses? As rail strikes severely hit services we look at some of the claims being made around pay – and explain how you can measure average pay in different ways. Plus we investigate claims that Chancellor Rishi Sunak wasted £11bn by paying too much interest on Britain’s national debt. Is pollution from tyres really 2000 times worse than pollution from exhausts? And we look at sex and statistics in America. Produced in partnership with the Open University. Credits: Presenter: Tim Harford Series Producer: Charlotte McDonald Reporters: Nathan Gower, Jon Bithrey Production Coordinator: Janet Staples Sound Engineer: James Beard Editor: Richard Vadon