Question

Set of scores ranges from a high of x = 72 to a low of x = 28. if these scores were put in a grouped frequency distribution table, what would be the best choice for the interval width?

Answer 1

Choosing an appropriate intervals is essential when constructing frequency distribution tables. Most frequency distribution tables have about 6 to 15 classes, equal class intervals, and the starting point of each class should be divisible by the class interval and each observation must fit in only one class. Therefore, in this case, a class interval of 5 points will be most appropriate, such that with a range of about 50 we get 10 classes, starting with a class of 25-30, and so on.