State true or false.

The tally mark IIII represents a frequency of 4.

The above statement is True.

Rules of making tally marks:

• Every single value of frequency represents a single vertical line.
• For the first four frequencies, the tally marks are 4 vertical lines, and the 5^th tally mark is a diagonal line which cuts all four lines.
• A new tally mark should be started if the previous tally mark has reached a total of 5 counts.

Therefore, using the rules mentioned above, the tally mark IIII shows frequency 4.