Answer
Tally: four sticks
Class Frequency = $4$
Work Step by Step
Identify and count the numbers that fall within the interval $16-20$.
They are: $17, 20, 20,$ and $18$.
Thus, tally will be four sticks, and the Class Frequency is $4$.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.