Preheat the oven to 180C/fan oven 160C/gas 4. Put the chicken thighs in a flameproof casserole with the ketchup, honey, Worcestershire sauce, orange juice, chicken stock, paprika, salt and lots of ...

The interquartile range is another measure of spread, except that it has the added advantage of not being affected by large outlying values. In order to calculate this value we must first understand ...