A health inspector analyzed the amount of sugar in 500 different snacks prepared in various school cafeterias, The collected data are shown in the following box-and-whisker diagram. H 11.5 12 13 18 20 Amount of sugar per snack in grams 3. State what 13 represents in the given diagram, [I mark] b. Write down the interquartile range for this data. [2 marks] c. Write down the approximate number of snacks whose amount of sugar ranges from 18 to 20 grains, [1 mark] The health inspector visits two school cafeterias. She inspects the same number of meals at each cafeteria. The data is shown in the following box-and-whisker diagrams. School Cafeteria 1 10 Amount of sugar per meal in grams School Cafeteria 2 15 17 22 Amount of sugar per meal in grams d. Meals prepared in the school cafeterias are required to have less than 10 grams of sugar. State, giving a reason. which school cafeteria has more meals that do not meet the requirement. [2 marks]At the end of a school day, the Headmaster conducted a survey asking students in how many classes they had used the internet. The data is shown in the following table. Number of classes in which the students used the internet Number of students 20 24 30 k 10 . State whether the data is discrete or continuous, [ I mark] b. The mean number of classes in which a student used the internet is 2. Find the value of &. [4 marks] c. It was not possible to ask every person in the school, so the Headmaster arranged the student names in alphabetical order and then asked every 10th person on the list. Identify the sampling technique used in the survey. [! mark]Each month the number of days of rain in Cardiff is recorded The following data was collected over a period of 10 months. 11 13 8 11 8 7 8 14 x 15 For these data the median number of days of rain per month is 10. a. Find the value of x. [2 marks] b. Find the standard deviation (2 marks] c. Find the interquartile range. [ 2 marks]Chicken eggs are classified by grade (4. 5.6, 7 or ), based on weight, A mixed carton contains 12 eggs and could include eggs from any grade. As part of the science project, Rocky buys 9 mixed cartons and soits the eggs according to their weight. Grade Weight, w (grams) Frequency 40 S w