I need help with this problem, because I don't understand clearly how hypothesis testing works.

Write the null and alternative hypotheses in words and using symbols for each of the following situations. (a) 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 w restaurant from a random sample of diners. Do these data provide convincing evidence of a difference in the average calorie intake of diners at this restaurant? cted data on the number of calories consumed at this Write the null and alternative hypotheses in words. @ null hypothesis: The current average calorie intake is 1100 calories. alternative hypothesis: The current average calorie intake is different than 1100 calories. null hypothesis: The current average calorie intake is 1100 calories. alternative hypothesis: The current average calorie intake is greater than 1100 calories. O null hypothesis: The current average calorie intake is 1100 calories. alternative hypothesis: The current average calorie intake is less than 1100 calories. null hypothesis: The current average calorie intake is greater than 1100 calories. alternative hypothesis: The current average calorie intake is less than 1100 calories. O null hypothesis: The current average calorie intake is different than 1100 calories. alternative hypothesis: The current average calorie intake is 1100 calories. Write the null and alternative hypotheses using symbols. HotM = 1100 Hall 1100 HA: u 1100 (b) Based on the performance of those who took the GRE exam between July 1, 2004 and June 30, 2007, the average Verbal Reasoning score was calculated to be 462. In 2011 the average verbal score was slightly higher. Do these data provide convincing evidence that the average GRE Verbal Reasoning score has changed since 2004? Write the null and alternative hypotheses in words. O null hypothesis: The current average Verbal Reasoning score is 462. alternative hypothesis: The current average Verbal Reasoning score is greater than 462. D null hypothesis: The current average Verbal Reasoning score is 462. alternative hypothesis: The current average Verbal Reasoning score is less than 462. O null hypothesis: The current average Verbal Reasoning score is 462. alternative hypothesis: The current average Verbal Reasoning score is different than 462. null hypothesis: The current average Verbal Reasoning score is greater than 462. alternative hypothesis: The current average Verbal Reasoning score is less than 462. null hypothesis: The current average Verbal Reasoning score is different than 462. alternative hypothesis: The current average Verbal Reasoning score is 462. Write the null and alternative hypotheses using symbols. O Ho: M > 462 HA: a 462 How = 462 HA: u = 462