HP 39g+ Graphing manual Clear is used, Data sets will need to be selected, Again before re-use

Key	Meaning	(Continued)
	Displays the current variable
	expression in standard
	mathematical form. Press		when
	done.
	Evaluates the variables in the
	highlighted column (C1, etc.)
	expression.
	Displays the menu for entering
	variable names or contents of
	variables.
	Displays the menu for entering math
	operations.
	Deletes the highlighted variable or
	the current character in the edit line.
CLEAR	Resets default specifications for the
	data sets or clears the edit line (if it
	was active).
	Note: If	CLEAR is used the
	data sets will need to be selected
	again before re-use.

To continue our example, suppose that the heights of the rest of the students in the class are measured, but each one is rounded to the nearest of the five values first recorded. Instead of entering all the new data in C1, we shall simply add another column, C2, that holds the frequencies of our five data points in C1.

Height	Frequency
(cm)
160	5
165	3
170	8

1752

1801

Statistics aplet 8-9