iECTlON A tnswer all questions in this section. All questions carry equal marks. Total is 20 marks . The difference between the upper- and lowereclass boundaries of a class is known as L. A set of numbers consists of four 5's. six 7's, ten 9's. eleven 12's. three 13's, two l4's. The mode of this 34 pf numbers is _ l. The class mark of a class is NJ and its class width is 6. The lower limit of the class is ,_ Cumulative frequency curve is also called .- 'r. The standard deviation of a sample of 100 observations equals 64. The variance of the sample equals. . . .. i. A is a characteristic or attribute of a subject that can assume different values? '. The amount of time needed to run the Dansoman marathon is an example of which type of variable? i. What type of sampling is being employed if the country is divided into economic classes and a sample is :hosen from each class to be surveyed? I. A set of data is given: 3. 7, ll, ll, 16. Amankwaa calculated a measure of center and got 9.6. which meast if center did he just calculate? l}. The level of measurement classies data into categories that can be ranked; however