What is the null and alternative hypotheses for the following situation? since 2008, chain restaurants in california have been required to display calorie counts of each menu item. prior to menus displaying calorie counts, the average calorie intake of diners at a restaurant was 1100 calories. after calorie counts started to be displayed on menus, a nutritionist collected data on the number of calories consumed at this restaurant from a random sample of diners. she wishes to find out if these data provide convincing evidence of a decrease in the average calorie intake of a diners at this restaurant?