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, . k. Suppose you have 35 observations, the smallest and largest of which are 128.2 and 310.4, respectively. Apply the accompanying procedure to choose classes for cutpoint grouping. Use eight classes. Choose the class width by rounding the calt approximate class width up to the nearest multiple of 5. Choose the lower cutpoint of the rst class by rounding the minimum observation down to the nearest multiple of 5. 0 Click the icon to view the procedure for choosing classes. Classes for omint grouping __under _ ~under 41nder _ _under _under __ w under _ funder E ' under [ 0 Choosing the Classes (Use ascending order.) . ,, _,. ,. .. f ,1 Q} - One way that we can choose the classes to be used for grouping a quantitative , data set is to rst decide on the (approximate) number of classes. From that b ' decision, we can then determine a class width and, subsequently, the classes themselves. Several methods can be used to decide on the number at classes. One method is to use the guidelines below. based on the number of observations. Number of Number of observations classes 25 or fewer 2550 Over 50 With the preceding guidelines in mind. use the stepbystep procedure below for choosing the classes. Step 1 Decide on the (approximatel number of classes. Step 2 Calculate an approximate class width using the value below and use the result to decide on a convenient class width. Enter your answer in the edit elds and then click Check Answer. ' Maximum obsswuh - Minimum observation Number of classes ' All Parts showing