What does it mean to calculate frequencies within a dataset?
to count the number of times a dataset is used by a student
to calculate the product of two variables to make a third variable
to count the number of cases that fall into different subgroups within a dataset
to calculate the sum of a column of variables in a dataset

Which of the following statements is false? a. a class can directly inherit from class object. b. if the class you're inheriting from declares instance variables as private, the inherited class can access those instance variables directly. c. a class's instance variables are normally declared private to enforce good software engineering. d. it's often much more efficient to create a class by inheriting from a similar class than to create the class by writing every line of code the new class requires.